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 A092164 #7 Jul 21 2015 00:40:37
%S A092164 1,11,61,371,2221,13331,79981,479891,2879341,17276051,103656301,
%T A092164 621937811,3731626861,22389761171,134338567021,806031402131,
%U A092164 4836188412781,29017130476691,174102782860141,1044616697160851
%N A092164 Let M = 2 X 2 matrix [ 1 2 / 5 4 ]; a(n) = (1,1) entry of M^n.
%F A092164 a(n) = (2*6^n + 5*(-1)^n)/7.
%F A092164 A092165 +(-1)^n.
%F A092164 a(n)=5*a(n-1)+6*a(n-2). G.f.: x*(1+6*x)/((1+x)*(1-6*x)). - _R. J. Mathar_, Apr 20 2009
%t A092164 Table[ MatrixPower[{{1, 2}, {5, 4}}, n][[1, 1]], {n, 20}] (* _Robert G. Wilson v_, Apr 22 2004 *)
%Y A092164 Cf. A092165, A092166, A092167.
%K A092164 nonn
%O A092164 1,2
%A A092164 Jun Mizuki (suzuki32(AT)sanken.osaka-u.ac.jp), Apr 01 2004
%E A092164 Edited by _Robert G. Wilson v_, Apr 22 2004