%I #4 Mar 10 2015 02:04:00
%S 0,1,2,3,4,5,6,7,8,9,1,1,1,1,1,1,1,1,1,1,1,2,4,8,1,9,1296,1,
%T 1073741824,25,1,3,9,128,8,4096,1628413597910449,72057594037927936,
%U 221073919720733357899776,1,1,4,1,1296,1073741824,1,1,1
%N Sequence of resulting numbers after 2nd step of iteration defined in A175398.
%C See A175398, A175400, A175401, A175402, A175403.
%e For n = 29: a(29) = 25 because for the number 29 there are 4 steps of defined iteration: {2^9 = 512}, {(5^1)^2 = 25}, {2^5 = 32}, {3^2 = 9}, and the 2nd step of the iteration ends with 25.
%K nonn
%O 0,3
%A _Jaroslav Krizek_, May 01 2010