Продолжить ряд 1,2,5,10,17,26

1, 2, 5, 10, 17, 26, 37, 50, 65, 82....1 +1 2 +3 5 + 5 10 + 7 17 + 9 26 + 11 = 37 37 + 13 = 50 50 + 15 = 65 65 + 17 = 82