%I #6 Feb 28 2024 08:08:55
%S 1,2,4,16,46,118,160,3740,3778,9704,10624,21460
%N Numbers k such that (3^k + 3*k)/3 is prime.
%C If it exists, a(13) > 75000.
%Y Cf. A104743, A221905.
%K nonn,hard,more
%O 1,2
%A _Hugo Pfoertner_, Feb 27 2024
