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 A191014 #28 Dec 23 2023 09:45:46
%S A191014 0,1,10,102,1040,10604,108120,1102408,11240320,114608016,1168560800,
%T A191014 11914824032,121485361920,1238683267264,12629803396480,
%U A191014 128775400499328,1313013611786240,13387686918861056,136502896412183040,1391804337959552512,14191049172419891200
%N A191014 a(n) = 10*a(n-1) + 2*a(n-2), with a(0)=0, a(1)=1.
%H A191014 Vincenzo Librandi, <a href="/A191014/b191014.txt">Table of n, a(n) for n = 0..1000</a>
%H A191014 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (10,2).
%F A191014 G.f.: -x /(-1 + 10*x + 2*x^2). - _R. J. Mathar_, Nov 21 2011
%t A191014 LinearRecurrence[{10,2}, {0,1}, 50]
%o A191014 (Magma) I:=[0, 1]; [n le 2 select I[n] else 10*Self(n-1)+2*Self(n-2): n in [1..50]]; // _Vincenzo Librandi_, Feb 20 2012
%o A191014 (PARI) Vec(x/(1-10*x-2*x^2)+O(x^99)) \\ _Charles R Greathouse IV_, Feb 20 2012
%K A191014 nonn,easy,less
%O A191014 0,3
%A A191014 _Vladimir Joseph Stephan Orlovsky_, May 24 2011