4 7 12 July 8, 2019 16 32 64 128 4 7 12 21 4 7 12 21 next number 4 7 12 19 4 7 12 6 4 7 12 19 nth term 4 7 12 19 sequence 4 7 12 as an improper fraction 4 7 12 x 4 7 1281 4 7 12 5 4 7 12 21 sequence 4 7 12 3 4 7 12 14 4 7 12 15 4 7 12 20
