%I #2 Mar 30 2012 17:26:27

%S 7,37,73,241,211,433,463,769,811,1321,1321,2089,1951,2689,2791,4513,

%T 3469,5077,6271,6121,6427,7129,7177,10369,7951,10453,10531,13441,

%U 15139,12601,18229,15937,17623,21013,15331,24841,23977,26449,24571,24481

%N a(n) is n-th prime == 1 (mod 6n).

%Y Cf. A138905, A138907.

%K nonn

%O 1,1

%A _Zak Seidov_, Apr 03 2008