Numbers whose base-4 representation contains exactly three 0's and three 3's.

Terms

a(0) =3087a(1) =3123a(2) =3132a(3) =3267a(4) =3276a(5) =3312a(6) =3843a(7) =3852a(8) =3888a(9) =4032a(10) =4159a(11) =4303a(12) =4339a(13) =4348a(14) =4879a(15) =4915a(16) =4924a(17) =5059a(18) =5068a(19) =5104a(20) =7183a(21) =7219a(22) =7228a(23) =7363a(24) =7372a(25) =7408a(26) =7939a(27) =7948a(28) =7984a(29) =8128