A293287 - OEIS

A293287

G.f.: Product_{m>0} 1/(1 + x^m + 2!*x^(2*m)).

1, -1, -2, 3, -1, -5, 9, 3, -20, 16, 20, -54, 19, 89, -123, -56, 287, -181, -383, 748, 37, -1520, 1406, 1619, -4439, 1190, 7768, -10102, -5494, 25673, -14754, -36660, 66367, 7047, -139852, 125785, 153573, -405349, 98671, 712275, -909382, -514965, 2332540, -1303341

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..500

FORMULA

Convolution inverse of A293204.

PROG

(PARI) Vec(prod(m=1, 50, 1/(1 + x^m + 2!*x^(2*m))) + O(x^50)) \\ Michel Marcus, Oct 05 2017

CROSSREFS

Column k=2 of A293285.

Cf. A293204.