Primes neighboring a 3-smooth number.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =11a(5) =13a(6) =17a(7) =19a(8) =23a(9) =31a(10) =37a(11) =47a(12) =53a(13) =71a(14) =73a(15) =97a(16) =107a(17) =109a(18) =127a(19) =163a(20) =191a(21) =193a(22) =257a(23) =383a(24) =431a(25) =433a(26) =487a(27) =577a(28) =647a(29) =769