A265512 a(n) = largest base-3 palindrome m <= n such that every base-3 digit of m is <= the corresponding digit of n; m is written in base 3.

0, 1, 2, 0, 11, 11, 0, 11, 22, 0, 101, 101, 0, 111, 111, 0, 121, 121, 0, 101, 202, 0, 111, 212, 0, 121, 222, 0, 1001, 1001, 0, 1001, 1001, 0, 1001, 1001, 0, 1001, 1001, 0, 1111, 1111, 0, 1111, 1111, 0, 1001, 1001, 0, 1111, 1111, 0, 1221, 1221, 0, 1001, 2002, 0, 1001, 2002, 0, 1001, 2002, 0, 1001, 2002, 0, 1111, 2112

Offset

0,3

Links

Table of n, a(n) for n=0..68.

Crossrefs

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

Sequence in context: A230696 A138542 A057862 * A102869 A274177 A364375

Adjacent sequences: A265509 A265510 A265511 * A265513 A265514 A265515

Keyword

nonn,base

Author

N. J. A. Sloane, Dec 09 2015

Status

approved