N = int(input())

MOD = 998244353

dp1 = [[0]*(N+1) for _ in range(N+1)]
dp1[0][0] = 1
for i in range(N):
    for j in range(N+1):
        if dp1[i][j] == 0:
            continue
        if j+1 <= N:
            dp1[i+1][j+1] += dp1[i][j]
            dp1[i+1][j+1] %= MOD
        if 1 <= j:
            dp1[i+1][j-1] += dp1[i][j]
            dp1[i+1][j-1] %= MOD

dp2 = [[0]*(N+1) for _ in range(N+1)]
for i in range(N):
    for j in range(N+1):
        if j+1 <= N:
            dp2[i+1][j+1] += dp2[i][j]
            dp2[i+1][j+1] %= MOD
        if 1 <= j:
            dp2[i+1][j-1] += (dp2[i][j]+(j-1)*dp1[i][j])%MOD
            dp2[i+1][j-1] %= MOD

print(dp2[-1][0])