Numbers having four 3's in base 9.

Terms

a(0) =2460a(1) =9021a(2) =15582a(3) =19956a(4) =20685a(5) =21414a(6) =21900a(7) =21981a(8) =22062a(9) =22116a(10) =22125a(11) =22134a(12) =22140a(13) =22141a(14) =22142a(15) =22144a(16) =22145a(17) =22146a(18) =22147a(19) =22148a(20) =22152a(21) =22161a(22) =22170a(23) =22179a(24) =22188a(25) =22224a(26) =22305a(27) =22386a(28) =22467a(29) =22548