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 A118553 #2 Mar 30 2012 18:40:03 %S A118553 1,1,0,0,1,0,0,0,1,1,1,0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0,1,0, %T A118553 0,0,1,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,1,0,1,1,0,0,0, %U A118553 0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,2,0,0,0,0 %N A118553 Number of permutations of digits of n which denote perfect power. %Y A118553 Cf. A039999. %K A118553 base,easy,nonn %O A118553 1,101 %A A118553 _Giovanni Teofilatto_, May 07 2006