Numbers having three 3's in base 6.

Terms

a(0) =129a(1) =345a(2) =561a(3) =669a(4) =705a(5) =741a(6) =759a(7) =765a(8) =771a(9) =774a(10) =775a(11) =776a(12) =778a(13) =779a(14) =783a(15) =789a(16) =813a(17) =849a(18) =993a(19) =1209a(20) =1425a(21) =1641a(22) =1857a(23) =1965a(24) =2001a(25) =2037a(26) =2055a(27) =2061a(28) =2067a(29) =2070