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 A121828 #8 Jun 22 2013 16:05:59
%S A121828 1,1,2,2,3,3,3,4,4,5,5,6,6,6,7,7,8,8,9,9,9,10,10,11,11,12,12,12,13,13,
%T A121828 14,14,14,15,15,16,16,17,17,17,18,18,19,19,20,20,20,21,21,22,22,23,23,
%U A121828 23,24,24,25,25,25,26,26,27,27,28,28,28,29,29,30,30,31,31,31,32,32,33
%N A121828 Ceiling((Pi-e)n).
%H A121828 Vincenzo Librandi, <a href="/A121828/b121828.txt">Table of n, a(n) for n = 1..1000</a>
%t A121828 Table[Ceiling[(Pi - E) n], {n, 80}] (* _Vincenzo Librandi_, Feb 21 2013 *)
%Y A121828 Cf. A121282.
%K A121828 nonn,easy
%O A121828 1,3
%A A121828 _Mohammad K. Azarian_, Aug 27 2006