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 A202953 #12 Nov 21 2013 12:50:22
%S A202953 8,8,7,4,5,5,1,7,2,1,8,3,1,2,4,2,9,5,8,7,4,6,3,1,4,5,5,2,2,5,4,3,4,6,
%T A202953 0,2,6,8,8,4,1,2,8,6,6,7,6,5,4,6,6,1,2,5,0,0,5,1,5,8,8,5,4,8,4,2,8,0,
%U A202953 1,2,9,0,2,0,5,5,6,3,7,8,1,8,9,4,7,9,3,4,2,7,0,2,1,6,5,3,4,3,3,8
%N A202953 Decimal expansion of x^x with x=Pi^Pi.
%e A202953 887455172183124295874631455225434602688412866765466125005.158854842801290205563781894793427...
%t A202953 With[{x=Pi^Pi},RealDigits[x^x,10,120][[1]]] (* _Harvey P. Dale_, Dec 31 2011 *)
%o A202953 (PARI) p(x)=x^x /* then type p(p(Pi)) */
%Y A202953 Cf. A073233 (Pi^Pi), A073234 (Pi^Pi^Pi), A073235 ((Pi^Pi)^Pi), A202949 ((e^e)^(e^e)).
%K A202953 nonn,cons
%O A202953 57,1
%A A202953 _M. F. Hasler_, Dec 26 2011