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 A155625 #20 Jul 30 2024 06:01:03
%S A155625 1,14,136,1394,14896,162074,1775656,19503554,214424416,2358209834,
%T A155625 25938473176,285315864914,3138445153936,34522779252794,
%U A155625 379750102018696,4177249243157474,45949734158539456,505447045679162954,5559917382211708216,61159090723292453234,672749996032071636976
%N A155625 a(n) = 11^n + 4^n - 1.
%H A155625 Paolo Xausa, <a href="/A155625/b155625.txt">Table of n, a(n) for n = 0..950</a>
%H A155625 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (16,-59,44).
%F A155625 G.f.: 1/(1-11*x)+1/(1-4*x)-1/(1-x).
%F A155625 E.g.f.: exp(11*x)+exp(4*x)-exp(x).
%F A155625 a(n) = 15*a(n-1)-44*a(n-2)-30 with a(0) = 1, a(1) = 14. - _Vincenzo Librandi_, Jul 21 2010
%t A155625 Table[11^n + 4^n - 1, {n, 0, 25}] (* _Paolo Xausa_, Jul 30 2024 *)
%o A155625 (PARI) a(n)=11^n+4^n-1 \\ _Charles R Greathouse IV_, Jun 11 2015
%Y A155625 Cf. A155588, A155589, A155590, A155592, A155593, A155594, A155595, A155596, A155597, A155598, A155599, A155600, A155601, A155622, A155623, A155624.
%K A155625 nonn,easy
%O A155625 0,2
%A A155625 _Mohammad K. Azarian_, Jan 29 2009