Greatest number of distinct digits of n in any base b>=2.

Terms

a(0) =1a(1) =2a(2) =2a(3) =2a(4) =2a(5) =2a(6) =2a(7) =2a(8) =2a(9) =2a(10) =3a(11) =2a(12) =2a(13) =2a(14) =3a(15) =2a(16) =2a(17) =3a(18) =3a(19) =2a(20) =3a(21) =2a(22) =2a(23) =3a(24) =2a(25) =2a(26) =3a(27) =3a(28) =3a(29) =3