Least odd prime p such that p*2^(2^n)+1 is prime.

Terms

a(0) =3a(1) =3a(2) =7a(3) =3a(4) =37a(5) =43a(6) =163a(7) =1171a(8) =607a(9) =223a(10) =1987a(11) =3541a(12) =23917a(13) =43627a(14) =8887a(15) =108517a(16) =1063a(17) =378667