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 A153079 #25 May 08 2025 15:27:05
%S A153079 3,15,171,2199,28563,371295,4826811,62748519,815730723,10604499375,
%T A153079 137858491851,1792160394039,23298085122483,302875106592255,
%U A153079 3937376385699291,51185893014090759,665416609183179843,8650415919381337935,112455406951957393131,1461920290375446110679
%N A153079 a(n) = 13^n + 2.
%H A153079 Vincenzo Librandi, <a href="/A153079/b153079.txt">Table of n, a(n) for n = 0..200</a>
%H A153079 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (14,-13).
%F A153079 From _R. J. Mathar_, Jan 05 2011: (Start)
%F A153079 a(n) = 1 + A141012(n+1).
%F A153079 G.f.: (3-27*x)/((13*x-1)*(x-1)). (End)
%F A153079 From _Elmo R. Oliveira_, May 07 2025: (Start)
%F A153079 E.g.f.: (2 + exp(12*x))*exp(x).
%F A153079 a(n) = 14*a(n-1) - 13*a(n-2). (End)
%t A153079 LinearRecurrence[{14,-13},{3,15},30]
%t A153079 13^Range[0,20]+2 (* _Harvey P. Dale_, Aug 13 2019 *)
%o A153079 (Magma) I:=[3, 15]; [n le 2 select I[n] else 14*Self(n-1)-13*Self(n-2): n in [1..30]]; // _Vincenzo Librandi_, Feb 25 2012
%Y A153079 Cf. A141012.
%K A153079 nonn,easy
%O A153079 0,1
%A A153079 _Vincenzo Librandi_, Feb 10 2009
%E A153079 a(9) corrected and a(17), a(18) added by _R. J. Mathar_, Jan 05 2011