N = int(input())
def fib(n):
    f = ((1 + 5**0.5) / 2)**n / 5**0.5 + 0.5
    return int(f)

L = [(fib(i+1)**2)%1000000007 for i in range(N)]
A = []
#print(L)
for j in range(len(L)) :
    a = L[j]%1000000007
    A.append(a)
print(sum(A))