Near-repdigit semiprimes with 3 as repeated digit.

Terms

a(0) =133a(1) =303a(2) =323a(3) =334a(4) =335a(5) =339a(6) =393a(7) =533a(8) =633a(9) =933a(10) =1333a(11) =3133a(12) =3233a(13) =3334a(14) =3337a(15) =3338a(16) =3353a(17) =3383a(18) =4333a(19) =6333a(20) =8333a(21) =13333a(22) =30333a(23) =33133a(24) =33233a(25) =33313a(26) =33323a(27) =33339a(28) =33373a(29) =33393