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 A183066 #18 Aug 01 2025 00:16:59
%S A183066 1,26,123,364,845,1686,3031,5048,7929,11890,17171,24036,32773,43694,
%T A183066 57135,73456,93041,116298,143659,175580,212541,255046,303623,358824,
%U A183066 421225,491426,570051,657748,755189,863070,982111,1113056,1256673,1413754,1585115,1771596
%N A183066 G.f.: A(x) = (1 + 21*x + 3*x^2 - x^3)/(1-x)^5.
%H A183066 Kelvin Voskuijl, <a href="/A183066/b183066.txt">Table of n, a(n) for n = 0..10000</a>
%H A183066 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1).
%F A183066 a(n) = A183065(n+1,1).
%o A183066 (PARI) {a(n)=polcoeff((1+21*x+3*x^2-x^3)/(1-x+x*O(x^n))^5,n)}
%Y A183066 Cf. A183065, A183067, A183068.
%K A183066 nonn,easy
%O A183066 0,2
%A A183066 _Paul D. Hanna_, Dec 22 2010