Numbers whose base-7 representation has the same nonzero number of 2's and 3's.

Terms

a(0) =17a(1) =23a(2) =66a(3) =72a(4) =101a(5) =108a(6) =119a(7) =120a(8) =123a(9) =124a(10) =125a(11) =129a(12) =136a(13) =143a(14) =149a(15) =156a(16) =161a(17) =162a(18) =165a(19) =166a(20) =167a(21) =177a(22) =184a(23) =191a(24) =213a(25) =219a(26) =262a(27) =268a(28) =311a(29) =317