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 A294258 #14 Oct 29 2020 17:13:43
%S A294258 1,-1,-1,5,1,79,31,-2059,-68095,129599,5586751,36420229,-159700991,
%T A294258 -6256012465,-94786800289,-3320395014091,74018996229121,
%U A294258 1093450523140351,-4548151329265025,-222875601233847931,-7118941159301980159,-60758029090422335281
%N A294258 Expansion of e.g.f.: exp((1-x)*(1-x^2)*(1-x^3)*(1-x^4)*(1-x^5) - 1).
%H A294258 Seiichi Manyama, <a href="/A294258/b294258.txt">Table of n, a(n) for n = 0..458</a>
%t A294258 With[{nn=30},CoefficientList[Series[Exp[Times@@(1-x^Range[5])-1],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Oct 29 2020 *)
%o A294258 (PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp((1-x)*(1-x^2)*(1-x^3)*(1-x^4)*(1-x^5)-1)))
%Y A294258 Column k=5 of A294254.
%K A294258 sign
%O A294258 0,4
%A A294258 _Seiichi Manyama_, Oct 26 2017
%E A294258 Definition clarified by _Harvey P. Dale_, Oct 29 2020