Numbers whose base-4 representation contains exactly two 1's and three 3's.

Terms

a(0) =383a(1) =479a(2) =503a(3) =509a(4) =863a(5) =887a(6) =893a(7) =983a(8) =989a(9) =1013a(10) =1151a(11) =1247a(12) =1271a(13) =1277a(14) =1343a(15) =1471a(16) =1487a(17) =1519a(18) =1523a(19) =1531a(20) =1532a(21) =1534a(22) =1663a(23) =1759a(24) =1783a(25) =1789a(26) =1823a(27) =1847a(28) =1853a(29) =1871