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 A116026 #2 Mar 30 2012 17:40:36 %S A116026 4,5,9,10,11,13,17,21,26,29,30,43,45,47,49,55,57,58,61,66,67,70,71,73, %T A116026 75,82,87,89,99,101,102,103,106,107,109,111,115,119,123,127,129,130, %U A116026 146,151,153,154,175,181,182,183,185,190,191,195,197,202,203,205,207 %N A116026 phi(n) plus n gives a semiprime (A001358). %e A116026 phi(101)+101=201=3*67. %Y A116026 Cf. A001358, A116015. %K A116026 nonn %O A116026 1,1 %A A116026 _Giovanni Resta_, Feb 13 2006