A328709 Dirichlet g.f.: Product_{k>=2} ((1 + k^(-s)) / (1 - k^(-s)))^k.

1, 4, 6, 16, 10, 36, 14, 60, 36, 60, 22, 168, 26, 84, 90, 208, 34, 252, 38, 280, 126, 132, 46, 696, 100, 156, 200, 392, 58, 660, 62, 692, 198, 204, 210, 1296, 74, 228, 234, 1160, 82, 924, 86, 616, 630, 276, 94, 2640, 196, 700, 306, 728, 106, 1556, 330

Offset: 1

Author

Ilya Gutkovskiy, Oct 26 2019

Keywords

• nonn

Comments

Dirichlet convolution of A050367 with A050368.

Crossrefs

Cf. A050367, A050368, A328707.

Formula

a(n) = Sum_{d|n} A050367(n/d) * A050368(d).