#include <bits/stdc++.h>
 
using namespace std;
 
#define DEBUG(x) cerr<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cerr<<#v<<":";for(int i=0;i<v.size();i++) cerr<<" "<<v[i]; cerr<<endl;
#define DEBUG_MAT(v) cerr<<#v<<endl;for(int i=0;i<v.size();i++){for(int j=0;j<v[i].size();j++) {cerr<<v[i][j]<<" ";}cerr<<endl;}
typedef long long ll;
// #define int ll
 
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); }
template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template<class S, class T> ostream& operator<<(ostream& os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; }
#define X first
#define Y second
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define rrep(i,n) for(int i=(int)(n)-1;i>=0;i--)
#define rrep1(i,n) for(int i=(int)(n);i>0;i--)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(),c.end()
template<class T> bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T &a, const T &b) { if (a>b) { a = b; return 1; } return 0; }
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = (ll)1e18 + 1;
const long double pi = 3.1415926535897932384626433832795028841971L;
#define Sp(p) cout<<setprecision(25)<< fixed<<p<<endl;
// int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
// int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
vi dx = {1, 0, -1, 0}, dy = {0, 1, 0, -1};
// vi dx2 = { 1,1,0,-1,-1,-1,0,1 }, dy2 = { 0,1,1,1,0,-1,-1,-1 };
#define fio() cin.tie(0); ios::sync_with_stdio(false);
const ll MOD = 1000000007;
// const ll MOD = 998244353;
// #define mp make_pair
//#define endl '\n'


signed main() {
    fio();

    int n, m;
    cin >> n >> m;

    // vector<vll> dp(m + 1, vll(n + 1, vl(2)));
    vll dp(n + 1, vl(2));
    rep (i, n + 1) {
        if (i == 0) dp[i][1] = 1;
        else dp[i][0] = 1;
    }

    rep (i, m) {
        vll ndp(n + 1, vl(2));
        rep (r, n + 1) {
            int b = n - r;
            rep (k, 2) {
                if (dp[r][k] == 0) continue;

                rep (i1, 2) {
                    int nr = r, nb = b;
                    int nk = k;
                    if (i1 == 0) nr--;
                    else nb--;
                    if (nr < 0 or nb < 0) continue;
                    rep (i2, 2) {
                        nr++; nb++;
                        if (i2 == 0) nr--;
                        else nb--;
                        if (nr == 0) nk = 1;
                        (ndp[nr][nk] += dp[r][k]) %= MOD;
                    }
                }
            }
        }
        swap(ndp, dp);

        // rep (r, n + 1) {
        //     rep (k, 2) {
        //         cout << dp[i + 1][r][k] << " ";
        //     }
        //     cout << endl;
        // }
        // cout << endl;
    }

    ll ans = 0;
    rep (i, n + 1) ans += dp[i][1];
    ans %= MOD;
    cout << ans << endl;
}

Measured memory_bytes: 3872