Multiples of 3 in A247665 in order of appearance.

Terms

a(0) =9a(1) =15a(2) =27a(3) =57a(4) =81a(5) =177a(6) =243a(7) =393a(8) =579a(9) =729a(10) =849a(11) =1257a(12) =2187a(13) =4197a(14) =4143a(15) =5853a(16) =6561a(17) =17817a(18) =17781a(19) =19683a(20) =56157a(21) =59049a(22) =104289a(23) =104277a(24) =154509