A050432 Length of longest palindromic subword of (n base 4).

1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 2, 3, 1, 1, 2, 3, 2, 2, 1, 3, 2, 1, 1, 3, 1, 2, 2, 1, 3, 1, 1, 2, 3, 1, 2, 2, 3, 2, 1, 1, 3, 2, 2, 1, 1, 3, 1, 2, 1, 3, 1, 1, 2, 3, 2, 2, 2, 3, 3, 4, 2, 2, 3, 3, 3, 3, 3, 1, 2, 1, 3, 1, 1, 2, 2, 3, 2, 2, 3, 4, 3, 3, 2, 3, 2