Class 1- (or Pierpont) primes: primes of the form 2^t*3^u + 1.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =13a(5) =17a(6) =19a(7) =37a(8) =73a(9) =97a(10) =109a(11) =163a(12) =193a(13) =257a(14) =433a(15) =487a(16) =577a(17) =769a(18) =1153a(19) =1297a(20) =1459a(21) =2593a(22) =2917a(23) =3457a(24) =3889a(25) =10369a(26) =12289a(27) =17497a(28) =18433a(29) =39367