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 A168317 #9 Jan 22 2023 09:16:21
%S A168317 1,1,3,6,16,39,103,263,690,1791,4693,12247,32073,83869,219598,574658,
%T A168317 1504540,3938272,10310703
%N A168317 Eigensequence of triangle A168316.
%C A168317 Conjectured convergent of a(n)/a(n-1) = phi^2 = 2.6180339... E.g.: a(19)/a(18) = 10310703/3938272 = 2.6180779....
%F A168317 Equals lim_{n->oo} M^2, the left shifted vector considered as a sequence where M = triangle A168316 as an infinite lower triangular matrix, then shifted down one row, and inserting a "1" at top.
%Y A168317 Cf. A104457, A168316, A168318.
%K A168317 eigen,nonn,more
%O A168317 1,3
%A A168317 _Gary W. Adamson_, Nov 22 2009