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 A155636 #19 Aug 03 2024 16:44:03
%S A155636 1,13,105,853,7185,62173,547065,4861093,43437345,389373613,3496550025,
%T A155636 31429887733,282673677105,2543086531453,22882895970585,
%U A155636 205921649672773,1853172776742465,16677944639119693,150098449994264745,1350870791159320213,12157760826488569425,109419465968670562333
%N A155636 a(n) = 9^n + 5^n - 1.
%H A155636 Paolo Xausa, <a href="/A155636/b155636.txt">Table of n, a(n) for n = 0..1000</a>
%H A155636 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (15,-59,45).
%F A155636 G.f.: 1/(1-9*x)+1/(1-5*x)-1/(1-x).
%F A155636 E.g.f.: exp(9*x)+exp(5*x)-exp(x).
%F A155636 a(n) = 14*a(n-1)-45*a(n-2)-32 with a(0) = 1, a(1) = 13. - _Vincenzo Librandi_, Jul 21 2010
%t A155636 Table[9^n + 5^n - 1, {n, 0, 25}] (* _Paolo Xausa_, Aug 03 2024 *)
%o A155636 (PARI) a(n)=9^n+5^n-1 \\ _Charles R Greathouse IV_, Jun 11 2015
%Y A155636 Cf. A155624, A155625, A155626, A155627, A155628, A155629, A155630, A155631, A155632, A155633, A155634, A155635.
%K A155636 nonn,easy
%O A155636 0,2
%A A155636 _Mohammad K. Azarian_, Jan 30 2009