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 A265527 #8 Dec 09 2015 21:39:36 %S A265527 0,1,3,5,7,9,9,9,15,17,17,21,21,21,27,27,31,33,33,33,33,33,33,45,45, %T A265527 45,51,51,51,51,51,51,63,65,65,65,65,73,73,73,73,73,73,85,85,85,85,93, %U A265527 93,93,99,99,99,99,107,107,107,107,107,107,119,119,119,119,127,129,129,129,129,129,129,129,129,129,129,129 %N A265527 Largest base-2 palindrome m <= 2n, written in base 10. %Y A265527 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265527 nonn,base %O A265527 0,3 %A A265527 _N. J. A. Sloane_, Dec 09 2015