First differences are 3-1, 11-3, and so on ...
2, 8, 20, 38
Second differences are
6, 12, 18
Each second difference is 6 more than the last. The next second difference will be 18+6 = 24. The next first difference will be 38+24 = 62.
The next number in sequence is probably 69+62 = 131.
2, 8, 20, 38
Second differences are
6, 12, 18
Each second difference is 6 more than the last. The next second difference will be 18+6 = 24. The next first difference will be 38+24 = 62.
The next number in sequence is probably 69+62 = 131.
