A067809 - OEIS

%I #5 Mar 30 2012 18:38:52

%S 57,69,77,81,85,87,91,93,95,99,111,115,117,119,121,123,125,129,133,

%T 135,141,143,145,147,153,155,159,161,165,169,171,175,177,183,185,187,

%U 189,194,195,201,202,203,205,206,207,209,213,214,215,217,218,219,221,225

%N Composite n such that sigma(3*n) < prime(n).

%K nonn

%O 1,1

%A _Benoit Cloitre_, Feb 07 2002