Numbers having four 3's in base 10.

Terms

a(0) =3333a(1) =13333a(2) =23333a(3) =30333a(4) =31333a(5) =32333a(6) =33033a(7) =33133a(8) =33233a(9) =33303a(10) =33313a(11) =33323a(12) =33330a(13) =33331a(14) =33332a(15) =33334a(16) =33335a(17) =33336a(18) =33337a(19) =33338a(20) =33339a(21) =33343a(22) =33353a(23) =33363a(24) =33373a(25) =33383a(26) =33393a(27) =33433a(28) =33533a(29) =33633