"""

https://yukicoder.me/problems/no/3042

((())) -> 3
()(()) -> 1
(())() -> 1
(()()) -> 2

"""

N = int(input())

mod = 998244353

f = [0] * (N+1)
f[0] = 1

g = [0] * (N+1)

for i in range(N):

    nf = [0] * (N+1)
    ng = [0] * (N+1)

    for j in range(N+1):

        if j != 0:
            nf[j-1] += f[j]
            ng[j-1] += g[j] + f[j] * (j-1)

            nf[j-1] %= mod
            ng[j-1] %= mod

        if j != N:
            nf[j+1] += f[j]
            ng[j+1] += g[j]

            nf[j+1] %= mod
            ng[j+1] %= mod

    f,g = nf,ng

    # print (f,g)

print (g[0])