def mat_mul(a, b) :
    I, J, K = len(a), len(b[0]), len(b)
    c = [[0] * J for _ in range(I)]
    for i in range(I) :
        for j in range(J) :
            for k in range(K) :
                c[i][j] += a[i][k] * b[k][j]
    return c


def mat_pow(x, n):
    y = [[0] * len(x) for _ in range(len(x))]

    for i in range(len(x)):
        y[i][i] = 1

    while n > 0:
        if n & 1:
            y = mat_mul(x, y)
        x = mat_mul(x, x)
        n >>= 1
    return y


N = int(input())

if N <= 3:
    print([20,42,72,105,145,208,248,343,393,517,569,749,809,1022,1092][N-1])
    exit()

body = [[1,0,1,0],[5,1,0,0],[0,0,1,0],[0,0,0,1]]
pommel = [[1,0,0,0],[5,1,0,0],[0,0,1,0],[0,0,10,1]]
shrug = [[1,0,0,0],[0,1,0,0],[0,0,1,0],[11,0,0,1]]
rage = [[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,1,0,1]]

def solve(arg):
    now = [[0,0,0,1]]
    if N%2 == 1:
        now = mat_mul(now,mat_mul(mat_mul(rage,body),mat_mul(pommel,shrug)))
        cnt = (N-3)//2
    else:
        now = mat_mul(now,mat_mul(rage,shrug))
        cnt = (N-2)//2
    
    if arg > cnt:
        return [[0,0,-10**18,0]]
    
    X = mat_mul(rage,mat_mul(pommel,shrug))
    Y = mat_mul(body,mat_mul(pommel,shrug))
    
    
    now = mat_mul(now, mat_pow(X,arg))
    now = mat_mul(now, mat_pow(Y,cnt-arg))
    now = mat_mul(now,body)
    now = mat_mul(now,pommel)
    now = mat_mul(now,body)
    return (now)


if N%2 == 1:
    tmp = (N-3)//2
else:
    tmp = (N-2)//2


def sanbu():
    low = 0
    high = tmp+1
    ans = -float("inf")
    while low<high:
        M1 = (low*2+high)//3
        M2 = (low+high*2)//3
        A1 = solve(M1)[0][2]
        A2 = solve(M2)[0][2]
        ans = max(A1,A2,ans)
        if A1<A2:
            low = M1+1
        else:
            high = M2-1
    return ans

print(sanbu())