Least positive integer with even digit sum in bases 2..n.

Terms

a(0) =3a(1) =6a(2) =10a(3) =10a(4) =54a(5) =54a(6) =54a(7) =54a(8) =130a(9) =130a(10) =130a(11) =130a(12) =390a(13) =390a(14) =2000a(15) =2000a(16) =3238a(17) =3238a(18) =4080a(19) =4080a(20) =7326a(21) =7326a(22) =16584a(23) =16584a(24) =17310a(25) =17310a(26) =17310a(27) =17310a(28) =17310a(29) =17310