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

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =9a(6) =12a(7) =35a(8) =78a(9) =122a(10) =276a(11) =495a(12) =715a(13) =849a(14) =927a(15) =1128a(16) =1263a(17) =1418a(18) =23201a(19) =30316a(20) =34894a(21) =51844a(22) =200821a(23) =235383a(24) =265970