Numbers k such that 2*7^k + 5 is prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =9a(6) =11a(7) =15a(8) =33a(9) =38a(10) =239a(11) =419a(12) =441a(13) =486a(14) =5127a(15) =6953a(16) =6998a(17) =45609