Задача 6

s = 0


def f(x):
    global s
    s += 1
    if s >= 25:
        return 2*x + 1
    else:
        return f(2*x + 1)


for n in range(1, 41):
    s = 0
    res = f(n)
    if res == 536870911:
        print(n)