Numbers k such that 331*2^k+1 is prime.

Terms

a(0) =4a(1) =8a(2) =12a(3) =20a(4) =28a(5) =36a(6) =120a(7) =184a(8) =200a(9) =756a(10) =788a(11) =1304a(12) =6412a(13) =7848a(14) =12944a(15) =40116a(16) =45056a(17) =67520a(18) =129172a(19) =204592a(20) =225568a(21) =615116a(22) =803668a(23) =1646668a(24) =2917844