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 A378468 #7 Nov 27 2024 10:04:55
%S A378468 1,-720,339120,-132039360,46081214640,-14974899930720,
%T A378468 4627836408778560,-1377759164154871680,398508058352289409200,
%U A378468 -112648427646194257313040,31252327416307233967209120,-8536592939398421710286859840,2301363255613811638678456000320,-613491781086725734777586106900960
%N A378468 Coefficients in expansion of (1/E_4)^3.
%F A378468 a(n) ~ (-1)^n * 67108864 * Pi^36 * n^2 * exp(Pi*sqrt(3)*n) / (729 * Gamma(1/3)^54).
%t A378468 nmax = 20; CoefficientList[Series[(1+240*Sum[DivisorSigma[3, k]*x^k, {k, 1, nmax}])^(-3), {x, 0, nmax}], x]
%Y A378468 Cf. A004009, A001943, A287933, A378469.
%K A378468 sign
%O A378468 0,2
%A A378468 _Vaclav Kotesovec_, Nov 27 2024