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 A098986 #7 Jul 15 2014 03:30:37
%S A098986 0,1,-1,4,-1,6,-4,8,-1,13,-6,12,-4,14,-8,8,-1,18,-13,20,-6,32,-12,24,
%T A098986 -4,31,-14,40,-8,30,-8,32,-1,16,-18,48,-13,38,-20,56,-6,42,-32,44,-12,
%U A098986 26,-24,48,-4,57,-31,24,-14,54,-40,72,-8,80,-30,60,-8,62,-32,104,-1,84,-16,68,-18,32,-48,72,-13,74,-38,124,-20,96
%N A098986 Numerators (divided by 2) in series expansion of log( Sum_{m=-oo,oo} q^(m^2) ).
%e A098986 2*q-2*q^2+8/3*q^3-2*q^4+12/5*q^5-8/3*q^6+16/7*q^7-2*q^8+26/9*q^9-...
%t A098986 Numerator[CoefficientList[Series[Log[Sum[q^m^2, {m, -Infinity, Infinity}]], {q, 0, 77}], q]]/2 (* _L. Edson Jeffery_, Jul 14 2014 *)
%Y A098986 Cf. A000122, A098985, A098984.
%K A098986 sign,frac
%O A098986 0,4
%A A098986 _N. J. A. Sloane_, Oct 24 2004