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

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =9a(6) =14a(7) =15a(8) =16a(9) =27a(10) =45a(11) =122a(12) =125a(13) =213a(14) =242a(15) =256a(16) =263a(17) =290a(18) =855a(19) =1059a(20) =2273a(21) =3945a(22) =3999a(23) =9512a(24) =14127a(25) =16486a(26) =20056a(27) =28834a(28) =41493a(29) =159147