1 3 6 15 July 8, 2019 16 32 64 128 1 3 6 15 sequence 1 3 6 15x )=- 2 4x 1 2 3 6 15 1 3 x 6 15 1 3 6 10 and 15 are this type of number 1 3 6 10 and 15 3 1 6 7 15 1 m 3 5 6 15 3 1 4 15 6 1 3 5 6 15 1 3 (- 15z 6 9z 1 3 15y 6 1 3 15x 6 1 3 15 6 8 1 3 6 9 15 sequence
