%I #13 Jul 21 2020 09:44:34
%S 3,7,13,19,31,37,43,61,67,73,79,97,103,109,127,139,151,157,163,181,
%T 193,199,211,223,229,241,271,277,283,307,313,331,337,349,367,373,379,
%U 397,409,421,433,439,457,463,487,499,523,541,547,571,577,601,607,613,619
%N Duplicate of A007645.
%K dead
%O 1,1