A033770 - OEIS

A033770

Product t2(q^d); d | 11, where t2 = theta2(q)/(2*q^(1/4)).

1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 0, 2, 0, 0, 2, 0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 3, 1, 0, 2, 0, 0, 1, 0, 0, 0, 1, 1, 2, 0, 0, 1, 0, 0, 0, 0, 0, 1

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OFFSET

0,22

COMMENTS

Also the number of positive odd solutions to equation x^2 + 11*y^2 = 8*n + 12. - 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^22]^2/(QP[q] QP[q^11]))+O[q]^105; CoefficientList[s, q] (* Vincenzo Librandi, May 30 2017 *)

CROSSREFS

Sequence in context: A363738 A277143 A239434 * A216283 A262900 A242830

Adjacent sequences: A033767 A033768 A033769 * A033771 A033772 A033773