Numbers with digits 3 and 8 only.

Terms

a(0) =3a(1) =8a(2) =33a(3) =38a(4) =83a(5) =88a(6) =333a(7) =338a(8) =383a(9) =388a(10) =833a(11) =838a(12) =883a(13) =888a(14) =3333a(15) =3338a(16) =3383a(17) =3388a(18) =3833a(19) =3838a(20) =3883a(21) =3888a(22) =8333a(23) =8338a(24) =8383a(25) =8388a(26) =8833a(27) =8838a(28) =8883a(29) =8888