Numbers whose base-10 representation has the same nonzero number of 3's and 8's.

Terms

a(0) =38a(1) =83a(2) =138a(3) =183a(4) =238a(5) =283a(6) =308a(7) =318a(8) =328a(9) =348a(10) =358a(11) =368a(12) =378a(13) =380a(14) =381a(15) =382a(16) =384a(17) =385a(18) =386a(19) =387a(20) =389a(21) =398a(22) =438a(23) =483a(24) =538a(25) =583a(26) =638a(27) =683a(28) =738a(29) =783