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 A294372 #41 Dec 20 2017 03:29:48
%S A294372 1,-8,37,-144,540,-2016,7524,-28080,104796,-391104,1459620,-5447376,
%T A294372 20329884,-75872160,283158756,-1056762864,3943892700,-14718807936,
%U A294372 54931339044,-205006548240,765094853916,-2855372867424,10656396615780,-39770213595696,148424457767004
%N A294372 Expansion of (1-x)^4/(x^2 + 4*x + 1).
%H A294372 Seiichi Manyama, <a href="/A294372/b294372.txt">Table of n, a(n) for n = 0..1746</a>
%H A294372 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (-4,-1).
%F A294372 G.f.: 1/Sum_{k>=0} (k+1)^3*x^k.
%F A294372 From _Colin Barker_, Dec 19 2017: (Start)
%F A294372 a(n) = -6*sqrt(3)*((-2-sqrt(3))^n*(-2+sqrt(3)) + (-2+sqrt(3))^n*(2+sqrt(3))) for n > 2.
%F A294372 a(n) = -4*a(n-1) - a(n-2) for n > 4.
%F A294372 (End)
%o A294372 (PARI) N=66; x='x+O('x^N); Vec((1-x)^4/(x^2+4*x+1))
%Y A294372 Cf. A000578, A296617.
%K A294372 sign,easy
%O A294372 0,2
%A A294372 _Seiichi Manyama_, Dec 19 2017