362765domain: NAppears in sequencesNumbers k such that 3*2^k + 1 is prime.at n=37A002253Numbers k such that 3*2^k + 1 is a prime factor of a generalized Fermat number 10^(2^m) + 1 for some m.at n=4A268659Numbers n such that 3*2^n + 1 is a prime factor of a generalized Fermat number 12^(2^m) + 1 for some m.at n=12A268660