#!/mnt/c/Users/moiki/bash/env/bin/python
N = int(input())

s = [ 0 for _ in range(N+1)]
s[0] = set([""])
for i in range(1,N+1):
    lst = []
    for ss in s[i-1]:
        lst.append("(" + ss +")")
        lst.append("()"+ss)
        lst.append(ss+"()")

    for p in range(1,i+1): # 0 to N (i)
        if s[i-p] != 0:
            for ss2 in s[i-p]: # 0 to 
                if s[p] != 0:
                    for ss3 in s[p]:
                        lst.append( ss2 + ss3 ) 
                        lst.append( ss3 + ss2 ) 

    s[i] = set(lst)

print(len(s[N]))
# print(s[N])