3 1 9 7 July 8, 2019 16 32 64 128 (- 3 9 1 7 2 1 3 9 7 5 3 1 7 9 14 1 3 7 9 as a fraction 1 3 7 9 11 1 3 7 9 sequence 1 3 7 9 tetramethyl uric acid 1 3 7 9 13 1 3 7 9 10 1 3 7 9 5 6 3 1 x 9 7 1 3 7 9 8 3 9 1 9 7 6 1 3 7 9 4 1 3 times 9 7