Numbers whose base-7 representation has 2 fewer 0's than 6's.

Terms

a(0) =48a(1) =97a(2) =146a(3) =195a(4) =244a(5) =293a(6) =307a(7) =314a(8) =321a(9) =328a(10) =335a(11) =337a(12) =338a(13) =339a(14) =340a(15) =341a(16) =440a(17) =489a(18) =538a(19) =587a(20) =636a(21) =650a(22) =657a(23) =664a(24) =671a(25) =678a(26) =680a(27) =681a(28) =682a(29) =683