Smallest base relative to which n is palindromic.

Terms

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