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 A116003 #2 Mar 30 2012 17:40:36 %S A116003 1,32,512,3888,8192,25000,62208,131072,314928,400000,759375,995328, %T A116003 2097152,2839714,3037500 %N A116003 n*phi(n)*phi(phi(n)) is a fourth power. %e A116003 3888*phi(3888)*phi(phi(3888))=216^4. %Y A116003 Cf. A055744, A116002. %K A116003 nonn %O A116003 1,2 %A A116003 _Giovanni Resta_, Feb 13 2006