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 A047669 #20 May 31 2023 15:37:08
%S A047669 5,26,95,276,681,1486,2947,5416,9357,15362,24167,36668,53937,77238,
%T A047669 108043,148048,199189,263658,343919,442724,563129,708510,882579,
%U A047669 1089400,1333405,1619410,1952631,2338700,2783681,3294086,3876891,4539552,5290021,6136762,7088767
%N A047669 Row 5 of array in A047666.
%H A047669 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (6,-15,20,-15,6,-1)
%F A047669 a(n) = (n/15) * (2n^4 + 30n^2 + 43).
%F A047669 G.f.: x*(5*x^4-4*x^3+14*x^2-4*x+5)/(x-1)^6.
%t A047669 Table[(n/15)(2n^4+30n^2+43),{n,40}] (* _Harvey P. Dale_, May 25 2023 *)
%K A047669 nonn,easy
%O A047669 1,1
%A A047669 _N. J. A. Sloane_