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 A164093 #14 Mar 08 2025 15:26:28
%S A164093 38,146,578,2306,9218,36866,147458,589826,2359298,9437186,37748738,
%T A164093 150994946,603979778,2415919106,9663676418,38654705666,154618822658,
%U A164093 618475290626,2473901162498,9895604649986,39582418599938,158329674399746,633318697598978,2533274790395906
%N A164093 a(n) = 9*4^n + 2.
%H A164093 Vincenzo Librandi, <a href="/A164093/b164093.txt">Table of n, a(n) for n = 1..1000</a>
%H A164093 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (5,-4).
%F A164093 a(n) = A002063(n) + 2.
%F A164093 a(n) = 5*a(n-1) - 4*a(n-2).
%F A164093 G.f.: 2*x*(19-22*x)/((4*x-1)*(x-1)).
%F A164093 E.g.f.: exp(x)*(9*exp(3*x) + 2) - 11. - _Elmo R. Oliveira_, Mar 08 2025
%t A164093 LinearRecurrence[{5,-4},{38,146},50] (* _Vincenzo Librandi_, Mar 06 2012 *)
%Y A164093 Cf. A002063, A153465.
%K A164093 nonn,easy
%O A164093 1,1
%A A164093 _Vincenzo Librandi_, Aug 10 2009
%E A164093 Edited by _R. J. Mathar_, Aug 21 2009