A276551 Convolution square of A073592.

1, -2, -3, 2, 6, 12, 1, -10, -32, -46, -24, 18, 96, 168, 213, 124, -61, -386, -734, -992, -957, -386, 685, 2288, 3939, 5158, 5012, 2930, -1853, -8888, -17283, -24782, -28312, -24422, -9825, 16674, 54197, 96584, 134729, 153718, 138624, 73438, -49526, -228614

Offset

0,2

Links

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Formula

G.f.: Product_{k>0} (1-x^k)^(k*2).

G.f.: exp(-2*Sum_{k>=1} x^k/(k*(1 - x^k)^2)). - Ilya Gutkovskiy, May 30 2018

Crossrefs

Column k=2 of A276554.

Product_{k>0} (1-x^k)^(k*m): A161870 (m=-2), A073592 (m=1), this sequence (m=2), A276552 (m=3).

Sequence in context: A355266 A188881 A143806 * A109878 A354796 A104565

Adjacent sequences: A276548 A276549 A276550 * A276552 A276553 A276554

Keyword

sign

Author

Seiichi Manyama, Apr 10 2017

Status

approved