%I #9 Mar 30 2012 18:51:17
%S 1,256,443426488243037769948249630619149892803
%N (n^n)^(n^n)
%C The next four terms have 617, 10922, 217833 and 4871823 digits respectively. - _Rick L. Shepherd_, May 07 2006
%F a(n) = A000312(A000312(n)) = n^A007778(n) = A002488(n)^n = A002489(n)^A000169(n)
%K nonn,easy,bref
%O 1,2
%A _Henry Bottomley_, Jun 08 2000