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 A189747 #35 Jun 02 2025 04:04:26
%S A189747 5,3,30,159,885,4902,27165,150531,834150,4622343,25614165,141937854,
%T A189747 786531765,4358472387,24151957230,133835203311,741631888245,
%U A189747 4109665051158,22773220920525,126195099756099,699295161542070,3875061106978647,21473191019519445
%N A189747 a(1)=5, a(2)=3, a(n)=5*a(n-1) + 3*a(n-2).
%H A189747 Vincenzo Librandi, <a href="/A189747/b189747.txt">Table of n, a(n) for n = 1..100</a>
%H A189747 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (5,3).
%F A189747 G.f.: x*(5-22*x)/(1-5*x-3*x^2). - _Bruno Berselli_, May 24 2011
%t A189747 LinearRecurrence[{5,3},{5,3},40]
%o A189747 (Maxima) a[1]:5$ a[2]:3$ a[n]:=5*a[n-1]+3*a[n-2]$ makelist(a[n], n, 1, 23); /* _Bruno Berselli_, May 24 2011 */
%Y A189747 Cf. A000045, A000079, A105476, A159612, A080040, A135522, A103435, A189732, A189734, A189735, A189736, A189737, A189738, A189739, A189741, A189742, A189743, A189744, A189745, A189746, A189748, A189749.
%K A189747 nonn,easy
%O A189747 1,1
%A A189747 _Harvey P. Dale_, Apr 26 2011