#include<bits/stdc++.h>
//ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//clock_t start=clock();clock_t end=clock();cout<<(double)(end-start)/CLOCKS_PER_SEC<<endl;
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int ui;
typedef pair<int,int> pii;
typedef pair<pii,int> ppii;
typedef pair<int,pii> pipi;
typedef pair<ll,ll> pll;
typedef pair<pll,ll> ppll;
typedef pair<ll,pll> plpl;
typedef pair<pii,pii> P;
typedef tuple<ll,ll,ll> tl;
typedef pair<double,double> pdd;
typedef vector<vector<ll>> mat;
ll mod=1000000007;
ll mod2=998244353;
ll mod3=1000003;
ll mod4=998244853;
ll mod5=1000000009;
ll inf=1LL<<62;
double pi=3.141592653589793238462643383279L;
double eps=1e-14;
#define rep(i,m,n) for(ll i=m;i<n;i++)
#define rrep(i,n,m) for(ll i=n;i>=m;i--)
#define srep(itr,st) for(auto itr=st.begin();itr!=st.end();itr++)
#define mrep(itr,mp) for(auto itr=mp.begin();itr!=mp.end();itr++)
#define Max(a,b) a=max(a,b)
#define Min(a,b) a=min(a,b)
int dh[4]={1,-1,0,0};
int dw[4]={0,0,1,-1};
int ddh[8]={-1,-1,-1,0,0,1,1,1};
int ddw[8]={-1,0,1,-1,1,-1,0,1};
struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
#define umh unordered_map<ll,ll,custom_hash>
ll gcd(ll a,ll b){
    if(a<b)swap(a,b);
    if(b==0)return a;
    if(a%b==0)return b;
    return gcd(b,a%b);
}
ll lcm(ll a,ll b){
    ll c=gcd(a,b);
    return a*b/c;
}
ll Pow(ll n,ll k){
    ll ret=1;
    ll now=n;
    while(k>0){
        if(k&1)ret*=now;
        now*=now;
        k/=2;
    }
    return ret;
}
ll beki(ll n,ll k,ll md){
  ll ret=1;
  ll now=n;
    now%=md;
  while(k>0){
    if(k%2==1){
      ret*=now;
      ret%=md;
    }
    now*=now;
    now%=md;
    k/=2;
  }
  return ret;
}
ll gyaku(ll n,ll md){
  return beki(n,md-2,md);
}
ll popcount(ll n){
    ll ret=0;
    ll u=n;
    while(u>0){
        ret+=u%2;
        u/=2;
        
    }
    return ret;
}
struct BIT{
private:
    ll u;
    vector<ll> bit;
public:
    BIT(ll n){
        u=1;while(u<n)u*=2;
        bit.resize(u+10,0);
        
    }
    void add(ll n,ll x){
        ll i=n;
        bit[i]+=x;
        bit[i]%=mod;
        while(i<u){
            i+=i&(-i);
            bit[i]+=x;
            bit[i]%=mod;
        }

    }
    ll sum(ll n){
        ll i=n;
        ll ret=0;
        while(i>0){
            ret+=bit[i];
            i-=i&(-i);
            ret%=mod;
        }
        return ret;
    }
    ll lb(ll w){
        if(w<=0)return 0;
        ll x=0;
        for(ll k=u;k>0;k/=2){
            if(x+k<=u&&bit[x+k]<w){
                w-=bit[x+k];
                x+=k;
            }
        }
        return x+1;
    }
};
//vector<BIT> b(26,n+1);
int main(){
    ios::sync_with_stdio(false);cin.tie(0);
    ll n,h,d;cin>>n>>h>>d;
    ll dp[h+1];
    BIT bi(h+1);
    dp[0]=1;
    ll kai[1000001];
    kai[0]=1;
    rep(i,1,1000001)(kai[i]=kai[i-1]*i)%=mod;
    ll sum=0;
    rep(i,1,n+1)(sum+=kai[i])%=mod;
    rep(i,1,h+1){
        ll l=i-d;
        if(l<=0){
            ll su=bi.sum(i-1);
            (su*=sum)%=mod;
            dp[i]=su+kai[n];
            dp[i]%=mod;
        }
        else{
            ll su=bi.sum(i-1)-bi.sum(l-1)+mod;
            su%=mod;
            (su*=sum)%=mod;
            dp[i]=su;
        }
        bi.add(i,dp[i]);
    }
    cout<<dp[h]<<endl;
}


Measured memory_bytes: 24064