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 A174174 #2 Mar 31 2012 12:38:31
%S A174174 2,1,-1,19,149,683,2568,8801,28814,92262,292334,921812,2900518,
%T A174174 9118183,28653193,90026155,282837225,888573621,2791553542,8769944569,
%U A174174 27551617590,86555987697,271923687926,854273498233,2683779389671
%N A174174 Floor(Pi^n-n^Pi).
%t A174174 Table[Floor[Pi^n-n^Pi],{n,5!}]
%Y A174174 Cf. A024012
%K A174174 sign
%O A174174 1,1
%A A174174 _Vladimir Joseph Stephan Orlovsky_, Mar 11 2010