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

Terms

a(0) =2a(1) =3a(2) =7a(3) =27a(4) =51a(5) =55a(6) =81a(7) =1471a(8) =1483a(9) =8668a(10) =10885a(11) =20803a(12) =32605a(13) =36391a(14) =57004a(15) =61627a(16) =88651a(17) =89731a(18) =133928a(19) =153428