A175300 a(1)=1. a(n) = A005179(d(a(n-1))) + a(n-1), where d(n) = the number of divisors of n, and A005179(n) is the smallest positive integer with exactly n divisors.

1, 2, 4, 8, 14, 20, 32, 44, 56, 80, 128, 152, 176, 224, 284, 296, 320, 512, 560, 800, 980, 1160, 1280, 1460, 1520, 1760, 2120, 2240, 3200, 3560, 3680, 4040, 4160, 5120, 8192, 8384, 8576, 8696, 8720, 8960, 10220, 10580, 10760, 10880, 11720, 11840, 12800