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A260983 Coefficients of the mock theta function gammabar(q). 0
1, 2, -2, 2, 2, -6, 4, 4, -8, 4, 4, -10, 6, 8, -16, 8, 10, -22, 12, 12, -26, 16, 16, -38, 20, 22, -48, 26, 28, -58, 32, 36, -78, 40, 44, -96, 52, 56, -116, 64, 68, -150, 80, 84, -182, 96, 104, -218, 118, 126, -270, 144, 152, -326, 172, 184, -388, 208, 220, -470, 248 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..60.

K. Bringmann, J. Dousse, J. Lovejoy, and K. Mahlburg, Overpartitions with restricted odd differences, Electron. J. Combin. 22 (2015), no.3, paper 3.17.

K. Bringmann and J. Lovejoy, Dyson's rank, overpartitions, and weak Maass forms, Int. Math. Res. Not. (2007), rnm063.

FORMULA

G.f.: 1 + 2*Sum_{n >= 1} q^(n(n+1)/2)*(1-q^2)(1-q^4)...(1-q^(2n-2))*(1-q^n)/((1-q^3)(1-q^6)...(1-q^(3*n)).

CROSSREFS

Sequence in context: A096625 A263455 A283677 * A103222 A304794 A175809

Adjacent sequences:  A260980 A260981 A260982 * A260984 A260985 A260986

KEYWORD

sign

AUTHOR

Jeremy Lovejoy, Aug 06 2015

STATUS

approved

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Last modified August 18 16:13 EDT 2018. Contains 313833 sequences. (Running on oeis4.)