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 A022137 #21 Oct 16 2017 12:23:41
%S A022137 5,12,17,29,46,75,121,196,317,513,830,1343,2173,3516,5689,9205,14894,
%T A022137 24099,38993,63092,102085,165177,267262,432439,699701,1132140,1831841,
%U A022137 2963981,4795822,7759803,12555625,20315428,32871053,53186481,86057534,139244015
%N A022137 Fibonacci sequence beginning 5, 12.
%H A022137 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>
%H A022137 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (1, 1).
%F A022137 G.f.: (5+7*x)/(1-x-x^2). - _Philippe Deléham_, Nov 20 2008
%F A022137 a(n) = Lucas(n + 4) - Fibonacci(n - 3). - _Ehren Metcalfe_, Oct 16 2017
%t A022137 a={};b=5;c=12;AppendTo[a, b];AppendTo[a, c];Do[b=b+c;AppendTo[a, b];c=b+c;AppendTo[a, c], {n, 4!}];a (* _Vladimir Joseph Stephan Orlovsky_, Sep 17 2008 *)
%Y A022137 Cf. A000032.
%K A022137 nonn,easy
%O A022137 0,1
%A A022137 _N. J. A. Sloane_