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A030213 Expansion of eta(q^5)*eta(q^19). 6
0, 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, 1, -1, 0, 0, 0, 1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, -1, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, -1, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

M. Koike, On McKay's conjecture, Nagoya Math. J., 95 (1984), 85-89.

FORMULA

Expansion of x * Product_{k>=1} (1 - x^(5*k)) * (1 - x^(19*k)). - Seiichi Manyama, Oct 18 2016

MATHEMATICA

eta = QPochhammer;

CoefficientList[q eta[q^5] eta[q^19] + O[q]^100, q] (* Jean-Fran├žois Alcover, Feb 21 2021 *)

CROSSREFS

Cf. Expansion of eta(q^k)*eta(q^(24 - k)): A030199 (k=1), A030201 (k=3), this sequence (k=5), A030214 (k=7), A030215 (k=9), A030216 (k=10), A030217 (k=11).

Sequence in context: A228495 A284683 A288673 * A187969 A132151 A238469

Adjacent sequences:  A030210 A030211 A030212 * A030214 A030215 A030216

KEYWORD

sign

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 26 18:26 EST 2022. Contains 350599 sequences. (Running on oeis4.)