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 A265519 #4 Dec 09 2015 20:19:16 %S A265519 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, %T A265519 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, %U A265519 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 %N 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. %Y A265519 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265519 nonn,base %O A265519 0,3 %A A265519 _N. J. A. Sloane_, Dec 09 2015