X 1 10 x 2 9 x 3 8 July 8, 2019 16 32 64 128 X 1 10 x 2 9 x 3 8 x 4 7 9 x 8 = (9 ^ x - 3 ^ (x + 1)) ^ 2 + 8 * 3 ^ (x + 1) 8 * 9 ^ x + 20
