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 A116046 #2 Mar 30 2012 17:40:36 %S A116046 2,3,6,7,8,11,14,18,23,27,29,31,34,37,38,42,45,47,53,55,59,63,65,66, %T A116046 69,73,74,83,89,90,91,93,103,105,107,109,110,117,119,123,125,127,129, %U A116046 130,131,138,139,143,145,150,151,157,167,174,175,179,182,183,185,186 %N A116046 n+phi(n)+phi(phi(n)) is a semiprime (A001358). %e A116046 103+phi(103)+phi(phi(103)) = 3*79. %Y A116046 Cf. A001358, A116045. %K A116046 nonn %O A116046 1,1 %A A116046 _Giovanni Resta_, Feb 13 2006