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 A121831 #18 Sep 02 2022 06:08:03
%S A121831 1,5,34,201,1179,6909,40488,237256,1390293,8146945,47740079,279750872,
%T A121831 1639304997,9606121523,56290666385,329856239532,1932916160781,
%U A121831 11326646086501,66372724369487,388935833836819,2279115167854766
%N A121831 a(n) = floor((Pi + e)^n).
%H A121831 Vincenzo Librandi, <a href="/A121831/b121831.txt">Table of n, a(n) for n = 0..999</a> [Offset shifted by _Georg Fischer_, Sep 02 2022]
%t A121831 Table[Floor[(Pi + E)^n], {n, 0, 80}] (* _Vincenzo Librandi_, Feb 21 2013 *)
%Y A121831 Cf. A059742 (Pi+e), A121282.
%K A121831 nonn,easy
%O A121831 0,2
%A A121831 _Mohammad K. Azarian_, Aug 27 2006
%E A121831 Offset changed by _Georg Fischer_, Sep 02 2022