#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<functional>
#include<math.h>
using namespace std;
#define N (1000000000+7)
#define M (998244353)
#define INF 1e16
typedef long long ll;
typedef pair<int,int> P;
 

int  A(int x){
    if(x>=0)return x;
    else return -x;
}

ll dp[302][90010];
ll sum[302][90010];

int main(void){
    ll n,d,k;
    cin>>n>>d>>k;
    dp[0][0]=1;
    for(ll i=0;i<n;i++){
        for(ll j=0;j<d*n;j++){
            sum[i][j+1] = (sum[i][j]+dp[i][j])%N;
        }
        for(ll j=1;j<=d*n;j++){
            dp[i+1][j] = (sum[i][j]-sum[i][j-min(j,d)]+N)%N;
        }
    }
    cout<<(dp[n][k]+N)%N<<endl;
    return 0;
}