A204292 Binomial(n, d(n)), where d(n) = A000005(n) is the number of divisors of n.

1, 1, 3, 4, 10, 15, 21, 70, 84, 210, 55, 924, 78, 1001, 1365, 4368, 136, 18564, 171, 38760, 5985, 7315, 253, 735471, 2300, 14950, 17550, 376740, 406, 5852925, 465, 906192, 40920, 46376, 52360, 94143280, 666, 73815, 82251, 76904685, 820, 118030185, 903, 7059052, 8145060

Offset: 1

Author

Franklin T. Adams-Watters, Jan 14 2012

Keywords

• nonn

Crossrefs

Cf. A000005, A066449, A068904.

Programs

Mathematica

Table[Binomial[n, DivisorSigma[0, n]], {n, 1, 50}] (* Vaclav Kotesovec, May 08 2021 *)

PARI

vector(60,n,binomial(n,numdiv(n)))