This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A265524 #4 Dec 09 2015 20:25:58 %S A265524 0,1,2,3,4,5,6,7,8,0,11,11,11,11,11,11,11,11,0,11,22,22,22,22,22,22, %T A265524 22,0,11,22,33,33,33,33,33,33,0,11,22,33,44,44,44,44,44,0,11,22,33,44, %U A265524 55,55,55,55,0,11,22,33,44,55,66,66,66,0,11,22,33,44,55,66,77,77,0,11,22,33,44,55,66,77,88,0,101,101 %N A265524 a(n) = largest base-9 palindrome m <= n such that every base-9 digit of m is <= the corresponding digit of n; m is written in base 9. %Y A265524 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265524 nonn,base %O A265524 0,3 %A A265524 _N. J. A. Sloane_, Dec 09 2015