9 7 8 5 1 4 July 8, 2019 16 32 64 128 1 7 8 5 9 x 4 9 7 2n 5 )= 8 4n 1 )- 9 7 2x 5 )= 8 4x 1 )- 9 8 5 4 9 1 7 sequence 8 5 4 9 1 7 pattern