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 A206611 #15 Sep 08 2022 08:46:01
%S A206611 13,7,20,27,47,74,121,195,316,511,827,1338,2165,3503,5668,9171,14839,
%T A206611 24010,38849,62859,101708,164567,266275,430842,697117,1127959,1825076,
%U A206611 2953035,4778111,7731146,12509257,20240403,32749660,52990063,85739723,138729786
%N A206611 Fibonacci sequence beginning 13, 7.
%H A206611 Vincenzo Librandi, <a href="/A206611/b206611.txt">Table of n, a(n) for n = 1..1000</a>
%H A206611 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (1, 1).
%t A206611 LinearRecurrence[{1, 1}, {13, 7}, 80]
%o A206611 (Magma) I:=[13, 7]; [n le 2 select I[n] else Self(n-1)+Self(n-2): n in [1..40]]; // _Vincenzo Librandi_, Feb 16 2012
%Y A206611 Cf. A000032, A000045, A206609, A206610.
%K A206611 nonn,easy
%O A206611 1,1
%A A206611 _Vladimir Joseph Stephan Orlovsky_, Feb 10 2012