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 A121838 #7 Jun 22 2013 16:05:59
%S A121838 6,35,202,1180,6910,40489,237257,1390294,8146946,47740080,279750873,
%T A121838 1639304998,9606121524,56290666386,329856239533,1932916160782,
%U A121838 11326646086502,66372724369488,388935833836820,2279115167854767
%N A121838 Ceiling((Pi+e)^n).
%H A121838 Vincenzo Librandi, <a href="/A121838/b121838.txt">Table of n, a(n) for n = 1..1000</a>
%t A121838 Table[Ceiling[(Pi + E)^n], {n, 1, 80}] (* _Vincenzo Librandi_, Feb 21 2013 *)
%Y A121838 Cf. A121282.
%K A121838 nonn,easy
%O A121838 1,1
%A A121838 _Mohammad K. Azarian_, Aug 28 2006