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 A321026 #14 Feb 16 2025 08:33:57
%S A321026 1,2,-2,-2,8,2,-14,-6,24,20,-54,-30,104,42,-170,-94,302,170,-524,-254,
%T A321026 852,422,-1406,-706,2256,1144,-3550,-1796,5628,2710,-8670,-4254,13190,
%U A321026 6650,-20118,-9842,30200,14618,-44874,-22014,66376,32590,-97350,-47398,141788,68668
%N A321026 Expansion of Product_{k>0} theta_3(q^(2*k-1))/theta_3(q^(2*k)), where theta_3() is the Jacobi theta function.
%H A321026 Seiichi Manyama, <a href="/A321026/b321026.txt">Table of n, a(n) for n = 0..1000</a>
%H A321026 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/JacobiThetaFunctions.html">Jacobi Theta Functions</a>
%Y A321026 Cf. A000122, A320068, A320078, A321027.
%K A321026 sign
%O A321026 0,2
%A A321026 _Seiichi Manyama_, Oct 26 2018