Numbers k such that 327*2^k+1 is prime.

Terms

a(0) =3a(1) =4a(2) =6a(3) =15a(4) =30a(5) =64a(6) =99a(7) =108a(8) =135a(9) =363a(10) =414a(11) =531a(12) =576a(13) =811a(14) =1326a(15) =1414a(16) =1476a(17) =1936a(18) =2371a(19) =3951a(20) =4195a(21) =13324a(22) =21696a(23) =23203a(24) =35790a(25) =46950a(26) =51756a(27) =55174a(28) =61876a(29) =92487