Base-3 Keith numbers.

Terms

a(0) =3a(1) =5a(2) =6a(3) =7a(4) =57a(5) =102a(6) =127a(7) =206a(8) =217a(9) =677a(10) =805a(11) =840a(12) =1486a(13) =1680a(14) =1887a(15) =2090a(16) =2834a(17) =8329a(18) =10145a(19) =12866a(20) =21127a(21) =23002a(22) =50782a(23) =67925a(24) =82685a(25) =96841a(26) =153861a(27) =178852a(28) =357896a(29) =3826652