A328711 Dirichlet g.f.: (1/2) * Product_{i>=1, j>=1} (1 + (i*j)^(-s))^i.

1, 3, 4, 10, 6, 24, 8, 37, 19, 36, 12, 104, 14, 48, 48, 118, 18, 144, 20, 156, 64, 72, 24, 412, 46, 84, 96, 208, 30, 360, 32, 376, 96, 108, 96, 720, 38, 120, 112, 618, 42, 480, 44, 312, 288, 144, 48, 1500, 85, 339, 144, 364, 54, 792, 144, 824, 160, 180, 60, 1848

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Formula

Dirichlet g.f.: Product_{k>=2} (1 + k^(-s))^sigma(k), where sigma = A000203.

Crossrefs

Cf. A000203, A050368, A242648, A328710.

Sequence in context: A139556 A191150 A023896 * A361655 A343876 A356150

Adjacent sequences: A328708 A328709 A328710 * A328712 A328713 A328714

Keyword

nonn

Author

Ilya Gutkovskiy, Oct 26 2019

Status

approved