#include <bits/stdc++.h>
using namespace std;
// #define int long long
#define REP(i, n) for (int i = 0, max_i = (n); i < max_i; i++)
#define REPI(i, a, b) for (int i = (a), max_i = (b); i < max_i; i++)
#define ALL(obj) begin(obj), end(obj)
#define RALL(obj) rbegin(obj), rend(obj)
#define fi first
#define se second
using ii = pair<int, int>;
vector<ii> dirs = {
    {1, 0}, {0, 1},  {-1, 0},  {0, -1},  // 4方向
    {1, 1}, {-1, 1}, {-1, -1}, {1, -1},  // 斜め
    {0, 0},                              // 自身
};
template <class T>
inline bool chmax(T& a, const T& b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
template <class T>
inline bool chmin(T& a, const T& b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template <class T, class S>
vector<T> make_vec(size_t n, S x) {
    return vector<T>(n, x);
}
template <class T, class... Ts>
auto make_vec(size_t n, Ts... ts) {
    return vector<decltype(make_vec<T>(ts...))>(n, make_vec<T>(ts...));
}

// debug
template <class T>
ostream& operator<<(ostream& s, vector<T>& d) {
    REP(i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : " ");
    return s;
}
template <class T>
ostream& operator<<(ostream& s, vector<vector<T>>& d) {
    REP(i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : "\n");
    return s;
}
template <class T, class S>
ostream& operator<<(ostream& s, pair<T, S>& p) {
    s << "{" << p.first << ", " << p.second << "}";
    return s;
}
template <class T, class S>
ostream& operator<<(ostream& s, map<T, S> m) {
    for (auto it = m.begin(); it != m.end(); it++) {
        s << *it << (next(it) == m.end() ? "" : "\n");
    }
    return s;
}
template <class T, class S>
ostream& operator<<(ostream& s, unordered_map<T, S> m) {
    for (auto it = m.begin(); it != m.end(); it++) {
        s << *it << (next(it) == m.end() ? "" : "\n");
    }
    return s;
}
#ifdef _MY_DEBUG
#define dump(...)                                                                                                     \
    cerr << "/* " << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << endl, dump_func(__VA_ARGS__), \
        cerr << "*/\n\n";
#else
#define dump(...)
#define endl "\n"
#endif
void dump_func() { cerr << endl; }
template <class Head, class... Tail>
void dump_func(Head&& h, Tail&&... t) {
    cerr << h << (sizeof...(Tail) == 0 ? "" : ", "), dump_func(forward<Tail>(t)...);
}

struct Fast {
    Fast() {
        cin.tie(0);
        ios::sync_with_stdio(false);
    }
} fast;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
constexpr int MOD = 1000000007;
// *************** TEMPLATE END ***************

template <class T>
T pow(T x, int n, const T UNION = 1) {
    T ret = UNION;
    while (n) {
        if (n & 1) ret *= x;
        x *= x;
        n >>= 1;
    }
    return ret;
}

template <int MD>
struct ModInt {
    int x;
    static unordered_map<int, int> to_inv;
    ModInt() : x(0) {}
    ModInt(int x_) {
        if ((x = x_ % MD + MD) >= MD) x -= MD;
    }

    ModInt& operator+=(ModInt that) {
        if ((x += that.x) >= MD) x -= MD;
        return *this;
    }
    ModInt& operator*=(ModInt that) {
        x = (unsigned long long)x * that.x % MD;
        return *this;
    }
    ModInt& operator-=(ModInt that) {
        if ((x -= that.x) < 0) x += MD;
        return *this;
    }
    ModInt& operator/=(ModInt that) {
        x = (unsigned long long)x * that.inv().x % MD;
        return *this;
    }

    ModInt operator-() const { return -x < 0 ? MD - x : -x; }
    ModInt operator+(ModInt that) const { return ModInt(*this) += that; }
    ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }
    ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }
    ModInt operator/(ModInt that) const { return ModInt(*this) /= that; }
    bool operator==(ModInt that) const { return x == that.x; }
    bool operator!=(ModInt that) const { return x != that.x; }
    ModInt inv() const { return to_inv.count(this->x) ? to_inv[this->x] : (to_inv[this->x] = pow(*this, MD - 2).x); }
    friend ostream& operator<<(ostream& s, ModInt<MD> a) {
        s << a.x;
        return s;
    }
    friend istream& operator>>(istream& s, ModInt<MD>& a) {
        s >> a.x;
        return s;
    }
};
template <int MD>
unordered_map<int, int> ModInt<MD>::to_inv;
using mint = ModInt<MOD>;

vector<mint> fact, fact_inv;
void init_factorial(int n) {
    fact = vector<mint>(n + 1, 1);
    fact_inv = vector<mint>(n + 1);
    for (int i = 0; i < n; i++) fact[i + 1] = fact[i] * (i + 1);
    fact_inv[n] = mint(1) / fact[n];
    for (int i = n - 1; i >= 0; i--) fact_inv[i] = fact_inv[i + 1] * (i + 1);
    // for (int i = 0; i < n + 1; i++) assert(fact[i] * fact_inv[i] == 1);
}
mint comb(int n, int r) { return fact[n] * fact_inv[r] * fact_inv[n - r]; }

// T0: 元の配列のモノイド
// T1: T0に対する作用素モノイド
template <class T0, class T1>
class BaseSegmentTree {
    // k番目のノードにのlazyを伝搬
    void eval(int k, int len) {
        // 定数倍高速化
        if (lazy[k] == u1) return;
        // len個分のlazy[k]を評価
        node[k] = g(node[k], p(lazy[k], len));
        if (k < N - 1) {
            // 最下段でなければ下のlazyに伝搬
            lazy[2 * k + 1] = f1(lazy[2 * k + 1], lazy[k]);
            lazy[2 * k + 2] = f1(lazy[2 * k + 2], lazy[k]);
        }
        lazy[k] = u1;
    }
    // k番目のノード[l, r)について、[a, b)の範囲内にxを作用
    void update(int a, int b, T1 x, int k, int l, int r) {
        eval(k, r - l);
        if (b <= l || r <= a) return;
        if (a <= l && r <= b) {
            lazy[k] = f1(lazy[k], x);
            eval(k, r - l);
        } else {
            update(a, b, x, 2 * k + 1, l, (l + r) / 2);
            update(a, b, x, 2 * k + 2, (l + r) / 2, r);
            node[k] = f0(node[2 * k + 1], node[2 * k + 2]);
        }
    }
    // k番目のノード[l, r)について、[a, b)のクエリを求める
    T0 query(int a, int b, int k, int l, int r) {
        if (r <= a || b <= l) return u0;
        eval(k, r - l);
        if (a <= l && r <= b) return node[k];
        T0 vl = query(a, b, 2 * k + 1, l, (l + r) / 2);
        T0 vr = query(a, b, 2 * k + 2, (l + r) / 2, r);
        return f0(vl, vr);
    }

public:
    int sz;  // 元の配列のサイズ
    int N;
    vector<T0> node;
    vector<T1> lazy;
    // T0上の演算、単位元
    virtual T0 f0(T0, T0) = 0;
    const T0 u0;
    // T1上の演算、単位元
    virtual T1 f1(T1, T1) = 0;
    const T1 u1;
    // 作用
    virtual T0 g(T0, T1) = 0;
    // 多数のt1(T1)に対するf1の合成
    virtual T1 p(T1, int) = 0;

    BaseSegmentTree(T0 u0, T1 u1) : u0(u0), u1(u1) {}
    void set_by_vector(const vector<T0>& a) {
        sz = a.size();
        for (N = 1; N < sz; N *= 2)
            ;
        node.resize(2 * N - 1, u0);
        lazy.resize(2 * N - 1, u1);
        for (int i = 0; i < sz; i++) node[N - 1 + i] = a[i];
        for (int i = N - 2; i >= 0; i--) node[i] = f0(node[2 * i + 1], node[2 * i + 2]);
    }
    void set_by_unit(int n) {
        sz = n;
        for (N = 1; N < sz; N *= 2)
            ;
        node.resize(2 * N - 1, u0);
        lazy.resize(2 * N - 1, u1);
    }
    // [a, b)にxを作用
    void update(int a, int b, T1 x) {
        assert(0 <= a && a < b && b <= sz);
        update(a, b, x, 0, 0, N);
    }
    void update(int a, T1 x) { update(a, a + 1, x); }
    // [a, b)
    T0 query(int a, int b) { return query(a, b, 0, 0, N); }
    T0 query(int a) { return query(a, a + 1); }
};

template <class T0, class T1>
struct SumAddQuery : public BaseSegmentTree<T0, T1> {
    SumAddQuery() : BaseSegmentTree<T0, T1>(0, 0) {}
    using BaseSegmentTree<T0, T1>::BaseSegmentTree;
    T0 f0(T0 x, T0 y) override { return x + y; }
    T1 f1(T1 x, T1 y) override { return x + y; }
    T0 g(T0 x, T1 y) override { return x + y; }
    T1 p(T1 x, int len) override { return x * len; }
};

signed main() {
    int n, H, D;
    cin >> n >> H >> D;
    init_factorial(n + 10);
    mint mul = 0;
    REPI(i, 1, n + 1) { mul += fact[i]; }

    SumAddQuery<mint, mint> seg;
    seg.set_by_unit(H + 1);
    seg.update(0, fact[n] / mul);
    REP (i, H) {
        mint now = seg.query(i);
        seg.update(i + 1, min(H + 1, i + D + 1), now * mul);
    }
    cout << seg.query(H) << endl;
}


Measured memory_bytes: 24448