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 A175400 #4 Mar 13 2015 23:34:57
%S A175400 0,1,2,3,4,5,6,7,8,9,1,1,1,1,1,1,1,1,1,1,1,2,4,8,1,9,1,1,1,32,1,3,9,1,
%T A175400 8,1,1,1,1,1,1,4,1,1,1,1,1,1,1,1,1
%N A175400 Sequence of resulting numbers after 3rd step of iteration defined in A175398.
%C A175400 See A175398, A175399, A175401, A175402, A175403.
%e A175400 For n = 29: a(29) = 32 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 3rd step of iteration ending with number 32.
%K A175400 nonn
%O A175400 0,3
%A A175400 _Jaroslav Krizek_, May 01 2010