n = int(input())

p = 1 / 6
C = 1 << 6
def seki(x,y):
    l = [[0] * C for _ in range(C)]
    for i in range(C):
        for j in range(C):
            for k in range(C):
                l[i][j] += x[i][k] * y[k][j]
    return l
A = [[0] * C for _ in range(C)]
tmp = [[0] * C for _ in range(C)]
for i in range(C):
    tmp[i][i] = 1
for bit in range(C):
    for j in range(6):
        mask = 1 << j
        A[bit | mask][bit] += p
while n:
    if n & 1:
        tmp = seki(tmp,A)
    A = seki(A,A)
    n >>= 1
print(tmp[C-1][0])