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 A289294 #20 Mar 05 2018 07:16:51
%S A289294 1,-132,-76428,-12686784,-4629945804,-1581036186312,-643032851554368,
%T A289294 -264454897726360704,-114830224962140965068,-50847479367845783084484,
%U A289294 -23070238839261012248537688,-10629338992044523324726971456
%N A289294 Coefficients in expansion of E_10^(1/2).
%H A289294 Seiichi Manyama, <a href="/A289294/b289294.txt">Table of n, a(n) for n = 0..367</a>
%F A289294 G.f.: Product_{n>=1} (1-q^n)^(A289024(n)/2).
%F A289294 a(n) ~ c * exp(2*Pi*n) / n^(3/2), where c = -3^(3/2) * Pi^(5/2) / (2^(9/2) * Gamma(3/4)^12) = -0.3503612261281732359954402284478780636268623476628... - _Vaclav Kotesovec_, Jul 02 2017, updated Mar 05 2018
%t A289294 nmax = 20; s = 10; CoefficientList[Series[Sqrt[1 - 2*s/BernoulliB[s] * Sum[DivisorSigma[s - 1, k]*x^k, {k, 1, nmax}]], {x, 0, nmax}], x] (* _Vaclav Kotesovec_, Jul 02 2017 *)
%Y A289294 E_k^(1/2): A289291 (k=2), A289292 (k=4), A289293 (k=6), A004009 (k=8), this sequence (k=10), A289295 (k=14).
%Y A289294 Cf. A013974 (E_10), A289024.
%K A289294 sign
%O A289294 0,2
%A A289294 _Seiichi Manyama_, Jul 02 2017