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 A265535 #6 Dec 09 2015 21:42:01 %S A265535 0,1,2,3,4,5,5,7,7,7,7,7,7,7,14,14,14,14,14,14,14,21,21,21,21,21,21, %T A265535 21,28,28,28,28,28,28,28,35,35,37,37,37,37,37,37,43,43,43,43,43,43,49, %U A265535 49,49,49,49,49,55,55,55,55,55,55,61,61,61,61,61,61,67,67,67,67,67,67,67,74,74,74,74,74,74,80,80,80 %N A265535 Largest base-6 palindrome m <= n, written in base 10. %Y A265535 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265535 nonn,base %O A265535 0,3 %A A265535 _N. J. A. Sloane_, Dec 09 2015