A265520 a(n) = largest base-7 palindrome m <= n such that every base-7 digit of m is <= the corresponding digit of n; m is written in base 7.

0, 1, 2, 3, 4, 5, 6, 0, 11, 11, 11, 11, 11, 11, 0, 11, 22, 22, 22, 22, 22, 0, 11, 22, 33, 33, 33, 33, 0, 11, 22, 33, 44, 44, 44, 0, 11, 22, 33, 44, 55, 55, 0, 11, 22, 33, 44, 55, 66, 0, 101, 101, 101, 101, 101, 101, 0, 111, 111, 111, 111, 111, 111, 0, 121, 121, 121, 121, 121, 121, 0, 131, 131, 131, 131, 131, 131, 0

Offset

0,3

Links

Table of n, a(n) for n=0..77.

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: A129835 A356965 A004182 * A256297 A256307 A030998

Adjacent sequences: A265517 A265518 A265519 * A265521 A265522 A265523

Keyword

nonn,base

Author

N. J. A. Sloane, Dec 09 2015

Status

approved