%I #5 Mar 30 2012 18:38:51
%S 1,8,9,10,12,15,20,28,30,32,35,36,42,45,50,54,58,60,70,80,92,93,95,
%T 100,110,114,122,123,124,125,130,132,142,143,145,152,155,162,165,168,
%U 169,171,172,174,175,176,178,180,183,185,186,195,198,200,204,209,212,216
%N Phi(n)*sigma(n)+1 is prime.
%K nonn
%O 1,2
%A _Benoit Cloitre_, Feb 04 2002