#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import numpy as np
MOD = 10**9 + 7

# %%
N = int(read())


# %%
def cumprod(A, MOD=MOD):
    L = len(A)
    Lsq = int(L**.5 + 1)
    A = np.resize(A, Lsq**2).reshape(Lsq, Lsq)
    for n in range(1, Lsq):
        A[:, n] *= A[:, n - 1]
        A[:, n] %= MOD
    for n in range(1, Lsq):
        A[n] *= A[n - 1, -1]
        A[n] %= MOD
    return A.ravel()[:L]


def make_fact(U, MOD=MOD):
    x = np.arange(U, dtype=np.int64)
    x[0] = 1
    fact = cumprod(x, MOD)
    x = np.arange(U, 0, -1, dtype=np.int64)
    x[0] = pow(int(fact[-1]), MOD - 2, MOD)
    fact_inv = cumprod(x, MOD)[::-1]
    fact.flags.writeable = False
    fact_inv.flags.writeable = False
    return fact, fact_inv


# %%
S = np.zeros((N + 1, N + 1), np.int64)
S[0, 0] = 1
for n in range(1, N + 1):
    S[n, 1:] += S[n - 1, :-1]
    S[n] += S[n - 1] * np.arange(N + 1)
    S[n] %= MOD

# %%
fact, fact_inv = make_fact(N + 10)
comb = fact[N] * fact_inv[: N + 1] % MOD * fact_inv[: N + 1][::-1] % MOD
coef = np.zeros((N + 1, N + 1), np.int64)
coef[N] = 1
k = np.arange(N + 1, dtype=np.int64)
coef[N - 1] = k * (k - 1)
for n in range(N - 1, 0, -1):
    coef[n - 1] = coef[n] * coef[N - 1] % MOD
answer = (coef * S % MOD * comb[:, None] % MOD).sum() % MOD
print(answer)