Numbers whose base-4 representation contains no 2's and exactly four 3's.

Terms

a(0) =255a(1) =511a(2) =831a(3) =895a(4) =975a(5) =991a(6) =1011a(7) =1015a(8) =1020a(9) =1021a(10) =1279a(11) =1535a(12) =1855a(13) =1919a(14) =1999a(15) =2015a(16) =2035a(17) =2039a(18) =2044a(19) =2045a(20) =3135a(21) =3199a(22) =3279a(23) =3295a(24) =3315a(25) =3319a(26) =3324a(27) =3325a(28) =3391a(29) =3455