(- 7 5 1 7 ) 2 9 July 8, 2019 16 32 64 128 5 1 2 7 9 kof 5 7 1 2 9 4 5 2 7 x 1 7 9 5 1 2 7 9 kof pattern 5 2 7 times 1 7 9 2 7-(5 9-1 2) -11 5 - 7 9 7 - 1 5/9
