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 A022029 #12 Jul 27 2015 11:37:00 %S A022029 4,13,42,135,433,1388,4449,14260,45706,146496,469546,1504979,4823727, %T A022029 15460908,49554976,158832563,509086778,1631714194,5229935889, %U A022029 16762880107,53728029453,172207945799,551957272549 %N A022029 a(n) = 3*a(n-1) + a(n-2) - a(n-3) - a(n-5). %C A022029 Sequence agrees with A010919 for n <= 35 only. %H A022029 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (3, 1, -1, 0, -1). %F A022029 G.f.: (4+x-x^2-x^4)/(1-3x-x^2+x^3+x^5). - _R. J. Mathar_, Oct 25 2008 %Y A022029 Cf. A010919. %K A022029 nonn %O A022029 0,1 %A A022029 _R. K. Guy_