A265519 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 10.

0, 1, 2, 3, 4, 5, 6, 0, 8, 8, 8, 8, 8, 8, 0, 8, 16, 16, 16, 16, 16, 0, 8, 16, 24, 24, 24, 24, 0, 8, 16, 24, 32, 32, 32, 0, 8, 16, 24, 32, 40, 40, 0, 8, 16, 24, 32, 40, 48, 0, 50, 50, 50, 50, 50, 50, 0, 57, 57, 57, 57, 57, 57, 0, 64, 64, 64, 64, 64, 64, 0, 71, 71, 71, 71, 71, 71, 0, 78, 78, 78, 78, 78, 78, 0, 85, 85

Offset

0,3

Links

Table of n, a(n) for n=0..86.

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: A275610 A195830 A080743 * A129835 A356965 A004182

Adjacent sequences: A265516 A265517 A265518 * A265520 A265521 A265522

Keyword

nonn,base

Author

N. J. A. Sloane, Dec 09 2015

Status

approved