A033772 Product t2(q^d); d | 13, where t2 = theta2(q)/(2*q^(1/4)).

1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 2, 2, 0, 1, 0, 0, 2, 0, 0, 0

Offset

0,29

Comments

Also the number of positive odd solutions to equation x^2 + 13*y^2 = 8*n + 14. - Seiichi Manyama, May 28 2017

Links

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

Mathematica

QP=QPochhammer; s=QP[q^2]^2 (QP[q^26]^2 / (QP[q] QP[q^13]))+O[q]^105; CoefficientList[s, q] (* Vincenzo Librandi, May 31 2017 *)

Crossrefs

Sequence in context: A122180 A363742 A378446 * A086015 A249856 A086012

Adjacent sequences: A033769 A033770 A033771 * A033773 A033774 A033775

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Seiichi Manyama, May 22 2017

Status

approved