/**
 * code generated by JHelper
 * More info: https://github.com/AlexeyDmitriev/JHelper
 * @author majk
 */

#ifndef MAJK_LIB
#define MAJK_LIB

#include <vector>
#include <stack>
#include <iostream>
#include <fstream>
#include <unordered_map>
#include <unordered_set>
#include <map>
#include <iomanip>
#include <set>
#include <functional>
#include <algorithm>
#include <numeric>
#include <cassert>
#include <cmath>
#include <string>
#include <queue>
#include <array>
#include <bitset>
using namespace std;

#define x first
#define y second
typedef std::pair<int,int> pii; typedef long long ll; typedef unsigned long long ull; typedef unsigned int ui; typedef pair<ui,ui> puu;

template <typename T, typename U> std::istream&operator>>(std::istream&i, pair<T,U>&p) {i >> p.x >> p.y; return i;}
template<typename T>std::istream&operator>>(std::istream&i,vector<T>&t) {for(auto&v:t){i>>v;}return i;}
template <typename T, typename U> std::ostream&operator<<(std::ostream&o, const pair<T,U>&p) {o << p.x << ' ' << p.y; return o;}
template<typename T>std::ostream&operator<<(std::ostream&o,const vector<T>&t) {if(t.empty())o<<'\n';for(size_t i=0;i<t.size();++i){o<<t[i]<<" \n"[i == t.size()-1];}return o;}
template<typename T> using minheap = priority_queue<T, vector<T>, greater<T>>;
template<typename T> using maxheap = priority_queue<T, vector<T>, less<T>>;
ui logceil(ll x) { return x?8*sizeof(ll)-__builtin_clzll(x):0; }

namespace std { template<typename T,typename U>struct hash<pair<T,U>>{hash<T>t;hash<U>u;size_t operator()(const pair<T,U>&p)const{return t(p.x)^(u(p.y)<<7);}}; }
template<typename T,typename F>T bsh(T l,T h,const F&f){T r=-1,m;while(l<=h){m=(l+h)/2;if(f(m)){l=m+1;r=m;}else{h=m-1;}}return r;}
template<typename F> double bshd(double l,double h,const F&f,double p=1e-9){ui r=3+(ui)log2((h-l)/p);while(r--){double m=(l+h)/2;if(f(m)){l=m;}else{h=m;}}return (l+h)/2;}
template<typename T,typename F>T bsl(T l,T h,const F&f){T r=-1,m;while(l<=h){m=(l+h)/2;if(f(m)){h=m-1;r=m;}else{l=m+1;}}return r;}
template<typename F> double bsld(double l,double h,const F&f){ui r=200;while(r--){double m=(l+h)/2;if(f(m)){h=m;}else{l=m;}}return (l+h)/2;}
template<typename T> T gcd(T a,T b) { if (a<b) swap(a,b); return b?gcd(b,a%b):a; }


template<typename T>class vector2:public vector<vector<T>>{public:vector2(){} vector2(size_t a,size_t b,T t=T()):vector<vector<T>>(a,vector<T>(b,t)){}};
template<typename T>class vector3:public vector<vector2<T>>{public:vector3(){} vector3(size_t a,size_t b,size_t c,T t=T()):vector<vector2<T>>(a,vector2<T>(b,c,t)){}};
template<typename T>class vector4:public vector<vector3<T>>{public:vector4(){} vector4(size_t a,size_t b,size_t c,size_t d,T t=T()):vector<vector3<T>>(a,vector3<T>(b,c,d,t)){}};
template<typename T>class vector5:public vector<vector4<T>>{public:vector5(){} vector5(size_t a,size_t b,size_t c,size_t d,size_t e,T t=T()):vector<vector4<T>>(a,vector4<T>(b,c,d,e,t)){}};


#endif
#ifndef MOD_H
#define MOD_H



template <unsigned int N> class Field {
    typedef unsigned int ui;
    typedef unsigned long long ull;
	inline ui pow(ui a, ui p){ui r=1,e=a;while(p){if(p&1){r=((ull)r*e)%N;}e=((ull)e*e)%N;p>>=1;}return r;}
	/*extended GCD(slow):ll t=0,nt=1,r=N,nr=a;while(nr){ll q=r/nr;t-=q*nt;swap(t,nt);r-=q*nr;swap(r,nr);}assert(r<=1);return(t<0)?t+N:t;*/
	inline ui inv(ui a){return pow(a,N-2);}
public:
    inline Field(int x = 0) : v(x<0?N+x:x) {}
	inline Field<N> pow(int p){return (*this)^p; }
	inline Field<N> operator^(int p){return {(int)pow(v,(ui)p)};}
    inline Field<N>&operator+=(const Field<N>&o) {if (v+o.v >= N) v += o.v - N; else v += o.v; return *this; }
    inline Field<N>&operator-=(const Field<N>&o) {if (v<o.v) v -= o.v-N; else v-=o.v; return *this; }
    inline Field<N>&operator*=(const Field<N>&o) {v=(ull)v*o.v % N; return *this; }
    inline Field<N>&operator/=(const Field<N>&o) { return *this*=inv(o.v); }
    inline Field<N> operator+(const Field<N>&o) const {Field<N>r{*this};return r+=o;}
    inline Field<N> operator-(const Field<N>&o) const {Field<N>r{*this};return r-=o;}
    inline Field<N> operator*(const Field<N>&o) const {Field<N>r{*this};return r*=o;}
    inline Field<N> operator/(const Field<N>&o) const {Field<N>r{*this};return r/=o;}
    inline Field<N> operator-() {if(v) return {(int)(N-v)}; else return {0};};
    inline Field<N>& operator++() { ++v; if (v==N) v=0; return *this; }
    inline Field<N> operator++(int) { Field<N>r{*this}; ++*this; return r; }
    inline Field<N>& operator--() { --v; if (v==-1) v=N-1; return *this; }
    inline Field<N> operator--(int) { Field<N>r{*this}; --*this; return r; }
    inline bool operator==(const Field<N>&o) const { return o.v==v; }
	inline bool operator!=(const Field<N>&o) const { return o.v!=v; }
	inline explicit operator ui() const { return v; }
	inline static vector<Field<N>>fact(int t){vector<Field<N>>F(t+1,1);for(int i=2;i<=t;++i){F[i]=F[i-1]*i;}return F;}
	inline static vector<Field<N>>invfact(int t){vector<Field<N>>F(t+1,1);Field<N> X{1};for(int i=2;i<=t;++i){X=X*i;}F[t]=1/X;for(int i=t-1;i>=2;--i){F[i]=F[i+1]*(i+1);}return F;}
private: ui v;
};
template<unsigned int N>istream &operator>>(std::istream&is,Field<N>&f){unsigned int v;is>>v;f=v;return is;}
template<unsigned int N>ostream &operator<<(std::ostream&os,const Field<N>&f){return os<<(unsigned int)f;}
template<unsigned int N>Field<N> operator+(int i,const Field<N>&f){return Field<N>(i)+f;}
template<unsigned int N>Field<N> operator-(int i,const Field<N>&f){return Field<N>(i)-f;}
template<unsigned int N>Field<N> operator*(int i,const Field<N>&f){return Field<N>(i)*f;}
template<unsigned int N>Field<N> operator/(int i,const Field<N>&f){return Field<N>(i)/f;}


typedef Field<1000000007> FieldMod;

struct Ring {
	template <typename T>
	static T div(T p, T q, T N) {
		T t=0,nt=1,r=N,nr=q;
		while(nr!=0){ T q=r/nr;t-=q*nt;r-=q*nr;swap(t,nt);swap(r,nr); }
		t=(t<0)?t+N:t;
		r=(r<0)?r+N:r;
		if (gcd(p,N)%r!=0) { return 0; }
		return (t*p/r)%N;
	}
};
#endif

template<typename T> struct Fenwick {
    explicit Fenwick(ui N=0, T t=T()):N(1u<<logceil(N)),F(this->N,t),t(t){}
    explicit Fenwick(const vector<T>&A, T t=T()):N(1u<<logceil(A.size())),F(A),t(t){
        F.resize(N); fill(F.begin()+A.size(),F.end(),t);
        for(int i=0;i<N;i++){int j=i+lsb(i+1);if(j<N)F[j]+=F[i];}}
    void add(int i, T v){while(i<=N){F[i]+=v;i+=lsb(i+1);}}
    T sum(int i)const{T sum(t);while(i){sum+=F[i-1];i-=lsb(i);}return sum;}
    T range(int i,int j)const{j++; T s(t);while(j>i){s+=F[j-1];j-=lsb(j);}while(i>j){s-=F[i-1];i-=lsb(i);}return s;}
    T get(int i)const{return range(i,i);}
    void set(int i, T v) {add(i, v-get(i)); }
    constexpr int lsb(int i)const{return i&-i;}
    ui N;vector<T> F;T t;
    int max_lower(T v) {
        // TODO: this returns suspicious results ...
        if (F[0] >= v) return -1;
        if (F[N-1] < v) return N-1;

        int x = 0; T a = t;
        for (int s = N>>1; s > 0; s >>= 1) if (a+F[x+s-1]<v) { a += F[x+s-1]; x += s; }
        return x;
    }
};

template<typename T> struct Fenwick2 {
    explicit Fenwick2(ui N=0, T t=T()):N(1u<<logceil(N)),F(this->N,this->N,t),t(t){}
//    explicit Fenwick2(const vector<vector<T>>&A, T t=T()):N(1u<<logceil(A.size())),F(A),t(t){
//            F.resize(N);
//            for (int i=0;i<A.size();++i) { F[i].resize(N); fill(F[i].begin()+A.size(),F[i].end(),t); }
//            for (int i=A.size();i<N;++i) { F[i].resize(N); fill(F[i].begin(),F[i].end(),t); }
//
////            for(int i=0;i<N;i++){int j=i+lsb(i+1);if(j<N)F[j]+=F[i];}
//    }
    void add(int x, int y, T v){
        while(x<=N){ int z = y; while(z<=N) { F[x][z] += v; z += lsb(z+1); }x +=lsb(x+1); }
    }

    T sum(int x, int y) {
        T sum(t);
        while (x <= N) { int z = y;while (z <= N) { sum += F[x][z];z -= lsb(z + 1); }x -= lsb(x + 1); }
        return sum;
    }
    T range(int x1, int y1, int x2, int y2) {
        T ans = sum(x2, y2);
        if (x1) ans -= sum(x1-1, y2);
        if (y1) ans -= sum(x2, y1-1);
        if (x1 && y1) ans += sum(x1-1,y1-1);
        return ans;
    }
    constexpr int lsb(int i)const{return i&-i;}
    ui N;vector2<T> F;T t;
};

class DTwinBinaryTrees {
public:
    void solve(istream& cin, ostream& cout) {
        int H; cin >> H;
        int L = 1<<H>>1;
        vector<int> P(L); cin >> P;
        for (int &p: P) --p;

        vector2<FieldMod> Z(H, L, 1), Z2 = Z;
        for (int i = 0; i < L; ++i) {
            int j = L+i;
            int h = H-1;
            while (j != 1) {
                Z[h--][i] *= j;
                j /= 2;
            }
            for (int d = 1; d < H; ++d) Z[d][i] *= Z[d-1][i];
        }


        vector<FieldMod> X(L, 1);
        for (int i = 0; i < L; ++i) X[i] = Z[H-1][i] * Z[H-1][P[i]];
        for (int i = 0; i < L; ++i) {
            for (int d = H-1; d >= 1; --d) Z[d][i] = FieldMod{1}/(Z[d][i]*Z[d-1][i]);
            for (int d = H-1; d >= 1; --d) Z2[d][i] = Z[d][i] - Z[d-1][i];
        }
        reverse(Z.begin(),Z.end());

        FieldMod ans = 0;
        Fenwick<FieldMod> F(L, 0);
        for (int h = 1; h < H; ++h) {
            for (int a = 0; a < L; a += 1<<h) {
                for (int x = a; x < a+(1<<h); ++x) F.add(P[x], X[x]);

                FieldMod block = 0;
                for (int x = a; x < a+(1<<h); ++x) {
                    FieldMod cur = 0;
                    for (int l = 0; l < H-1; ++l) {
                        int t = P[x]^(1<<l);
                        int hi = t|((1<<l)-1);
                        int lo = hi^((1<<l)-1);
                        FieldMod ff = F.range(lo, hi) * Z[l+1][P[x]];
                        cur += ff;
                    }
                    block += cur * X[x];
                }
                ans += block * Z2[H-1-h][a];

                for (int x = a; x < a+(1<<h); ++x) F.add(P[x], -X[x]);
            }
        }

        cout << ans/2 << '\n';
    }
};



int main() {
	ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
	DTwinBinaryTrees solver;
	std::istream& in(std::cin);
	std::ostream& out(std::cout);
	solver.solve(in, out);
    return 0;
}



Measured memory_bytes: 23696