Numbers having three 3's in base 9.

Terms

a(0) =273a(1) =1002a(2) =1731a(3) =2217a(4) =2298a(5) =2379a(6) =2433a(7) =2442a(8) =2451a(9) =2457a(10) =2458a(11) =2459a(12) =2461a(13) =2462a(14) =2463a(15) =2464a(16) =2465a(17) =2469a(18) =2478a(19) =2487a(20) =2496a(21) =2505a(22) =2541a(23) =2622a(24) =2703a(25) =2784a(26) =2865a(27) =3189a(28) =3918a(29) =4647