Numbers k such that 2*k!! + 1 is a prime.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =10a(10) =13a(11) =17a(12) =18a(13) =24a(14) =28a(15) =30a(16) =39a(17) =51a(18) =149a(19) =197a(20) =355a(21) =444a(22) =623a(23) =908a(24) =1084a(25) =1125a(26) =1577a(27) =1748a(28) =2584a(29) =2628