Smallest prime of the form (2*n)*3^m + 1 for some m >= 0, or -1 if no such prime exists.

Terms

a(0) =3a(1) =5a(2) =7a(3) =73a(4) =11a(5) =13a(6) =43a(7) =17a(8) =19a(9) =61a(10) =23a(11) =73a(12) =79a(13) =29a(14) =31a(15) =97a(16) =103a(17) =37a(18) =3079a(19) =41a(20) =43a(21) =397a(22) =47a(23) =433a(24) =151a(25) =53a(26) =163a(27) =1102249a(28) =59a(29) =61