A265532 Largest base-4 palindrome m <= n, written in base 4.

0, 1, 2, 3, 3, 11, 11, 11, 11, 11, 22, 22, 22, 22, 22, 33, 33, 101, 101, 101, 101, 111, 111, 111, 111, 121, 121, 121, 121, 131, 131, 131, 131, 131, 202, 202, 202, 202, 212, 212, 212, 212, 222, 222, 222, 222, 232, 232, 232, 232, 232, 303, 303, 303, 303, 313, 313, 313, 313, 323, 323, 323, 323, 333, 333, 1001, 1001

Offset: 0

Author

N. J. A. Sloane, Dec 09 2015

Keywords

• nonn
• base

Crossrefs

Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509.