Numbers whose base-9 representation has the same nonzero number of 3's and 4's.

Terms

a(0) =31a(1) =39a(2) =112a(3) =120a(4) =193a(5) =201a(6) =247a(7) =256a(8) =265a(9) =279a(10) =280a(11) =281a(12) =284a(13) =285a(14) =286a(15) =287a(16) =292a(17) =301a(18) =310a(19) =319a(20) =327a(21) =336a(22) =345a(23) =351a(24) =352a(25) =353a(26) =356a(27) =357a(28) =358a(29) =359