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 A036683 #9 May 26 2025 11:13:35
%S A036683 5,20,71,207,556,1390,3310,7576,16807,36331,76850,159575,326092,
%T A036683 657124,1307992,2575180,5020570,9702043,18599391,35397328,66918850,
%U A036683 125738650,234930380,436660010,807690455,1487269940,2727149885,4981046893
%N A036683 T(n+4,4) with T as in A036355.
%H A036683 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (5,-5,-10,15,11,-15,-10,5,5,1).
%F A036683 G.f.: (x^4+2x^3-4x^2-5x+5)/(1-x-x^2)^5.
%F A036683 a(n) = A001628(n)+3*A001872(n)+A001873(n). - _R. J. Mathar_, Jul 03 2022
%t A036683 LinearRecurrence[{5,-5,-10,15,11,-15,-10,5,5,1},{5,20,71,207,556,1390,3310,7576,16807,36331},30] (* _Harvey P. Dale_, May 26 2025 *)
%K A036683 nonn,easy
%O A036683 0,1
%A A036683 _Floor van Lamoen_