Numbers k such that 217*2^k+1 is prime.

Terms

a(0) =66a(1) =84a(2) =880a(3) =3344a(4) =4440a(5) =10148a(6) =18084a(7) =18210a(8) =28380a(9) =35296a(10) =335826a(11) =546500a(12) =570616a(13) =624208a(14) =670496a(15) =1690664a(16) =2264546