magic piramide 1 x 8 + 1 = 9 > > 12 x 8 + 2 = 98 > > 123 x 8 + 3 = 987 > > 1234 x 8 + 4 = 9876 > > 12345 x 8 + 5 = 98765 > > 123456 x 8 + 6 = 987654 > >...