A190950 Denominators corresponding to A190948.

1, 2, 5, 1, 85, 221, 8177, 204425, 204425, 8381425, 13023445, 10327591885, 1497500823325, 115192371025, 1334876299525, 512859474277505, 131804884889318785, 38766142614505525, 100791970797714365, 91216733571931500325, 7315582032468906326065, 124364894551971407543105, 60316973857706132658405925, 3196799614458425030895514025

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Prog

(PARI) a(n) = denominator(sum(k=0, n, binomial(n, k)*(-1)^k/(k^2+1))); \\ Michel Marcus, Jan 08 2024

Crossrefs

Cf. A190948.

Sequence in context: A177250 A102786 A222637 * A355676 A159985 A259667

Adjacent sequences: A190947 A190948 A190949 * A190951 A190952 A190953

Keyword

nonn,frac

Author

N. J. A. Sloane, May 24 2011

Status

approved