Primes of the form (2^a+1)*(3^b+1)-1 with a, b >= 0.

Terms

a(0) =3a(1) =5a(2) =7a(3) =11a(4) =17a(5) =19a(6) =29a(7) =67a(8) =83a(9) =89a(10) =131a(11) =139a(12) =163a(13) =251a(14) =257a(15) =409a(16) =487a(17) =1289a(18) =1459a(19) =4099a(20) =6563a(21) =6569a(22) =10939a(23) =12409a(24) =15859a(25) =32771a(26) =39367a(27) =59051a(28) =65537a(29) =65539