Numbers whose base-4 representation contains exactly two 0's and four 3's.

Terms

a(0) =3135a(1) =3279a(2) =3315a(3) =3324a(4) =3855a(5) =3891a(6) =3900a(7) =4035a(8) =4044a(9) =4080a(10) =4351a(11) =4927a(12) =5071a(13) =5107a(14) =5116a(15) =7231a(16) =7375a(17) =7411a(18) =7420a(19) =7951a(20) =7987a(21) =7996a(22) =8131a(23) =8140a(24) =8176a(25) =8447a(26) =9023a(27) =9167a(28) =9203a(29) =9212