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 A305699 #17 Feb 16 2025 08:33:54
%S A305699 1,0,-196884,-21493760,37899009486,8443309031424,-6829893232051144,
%T A305699 -2454385780209696768,1130962845597176786661,621972524796731658731520,
%U A305699 -164194903359722124902384028,-144508453392903668301846454272
%N A305699 Coefficients of 1/(q*(j(q)-744)) where j(q) is the elliptic modular invariant.
%H A305699 Vaclav Kotesovec, <a href="/A305699/b305699.txt">Table of n, a(n) for n = 0..370</a>
%H A305699 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/j-Function.html">j-Function</a>
%t A305699 CoefficientList[Series[1/((2^16 + x*QPochhammer[-1, x]^24)^3/(2*QPochhammer[-1, x])^24 - 744*x), {x, 0, 15}], x] (* _Vaclav Kotesovec_, Jun 09 2018 *)
%Y A305699 (q*(j(q)-744))^(k/4): A305698 (k=-2), A305696 (k=-1), A304020 (k=1), A305697 (k=2).
%Y A305699 Cf. A000521 (j), A014708 (j-744), A066395, A289417.
%K A305699 sign
%O A305699 0,3
%A A305699 _Seiichi Manyama_, Jun 08 2018