This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A260983 #16 Mar 04 2025 02:47:04
%S A260983 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,
%T A260983 22,-48,26,28,-58,32,36,-78,40,44,-96,52,56,-116,64,68,-150,80,84,
%U A260983 -182,96,104,-218,118,126,-270,144,152,-326,172,184,-388,208,220,-470,248
%N A260983 Coefficients of the mock theta function gammabar(q).
%H A260983 K. Bringmann, J. Dousse, J. Lovejoy, and K. Mahlburg, <a href="https://doi.org/10.37236/5248">Overpartitions with restricted odd differences</a>, Electron. J. Combin. 22 (2015), no.3, paper 3.17.
%H A260983 K. Bringmann and J. Lovejoy, <a href="http://arxiv.org/abs/0708.0692">Dyson's rank, overpartitions, and weak Maass forms</a>, arXiv:0708.0692 [math.NT], 2007; Int. Math. Res. Not. (2007), rnm063.
%F A260983 G.f.: 1 + 2*Sum_{n >= 1} q^(n*(n+1)/2)*(1-q^2)*(1-q^4)*...*(1-q^(2*n-2))*(1-q^n)/((1-q^3)*(1-q^6)*...*(1-q^(3*n))).
%K A260983 sign
%O A260983 0,2
%A A260983 _Jeremy Lovejoy_, Aug 06 2015