Numbers whose base-8 representation has 2 fewer 0's than 7's.

Terms

a(0) =63a(1) =127a(2) =191a(3) =255a(4) =319a(5) =383a(6) =447a(7) =463a(8) =471a(9) =479a(10) =487a(11) =495a(12) =503a(13) =505a(14) =506a(15) =507a(16) =508a(17) =509a(18) =510a(19) =639a(20) =703a(21) =767a(22) =831a(23) =895a(24) =959a(25) =975a(26) =983a(27) =991a(28) =999a(29) =1007