A363780 a(n) = [x^n] 1/(Sum_{k>=0} x^(k^2))^n.

1, -1, 3, -10, 31, -96, 294, -876, 2511, -6796, 16698, -33540, 31174, 184534, -1627812, 8912760, -41466433, 176963760, -714194382, 2766892840, -10374065814, 37815483948, -134334781732, 465432203640, -1571910265770, 5164302815179, -16438631981418

Offset

0,3

Links

Table of n, a(n) for n=0..26.

Crossrefs

Main diagonal of A363778.

Cf. A287617.

Sequence in context: A237930 A192337 A106517 * A055217 A097472 A068094

Adjacent sequences: A363777 A363778 A363779 * A363781 A363782 A363783

Keyword

sign

Author

Seiichi Manyama, Jun 21 2023

Status

approved