Numbers having four 6's in base 9.

Terms

a(0) =4920a(1) =11481a(2) =18042a(3) =24603a(4) =31164a(5) =37725a(6) =39912a(7) =40641a(8) =41370a(9) =42099a(10) =42828a(11) =43557a(12) =43800a(13) =43881a(14) =43962a(15) =44043a(16) =44124a(17) =44205a(18) =44232a(19) =44241a(20) =44250a(21) =44259a(22) =44268a(23) =44277a(24) =44280a(25) =44281a(26) =44282a(27) =44283a(28) =44284a(29) =44285