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 A265561 #4 Dec 10 2015 10:50:45 %S A265561 0,1,2,11,11,22,22,22,22,101,101,111,111,111,121,121,121,202,202,202, %T A265561 202,212,212,212,222,222,222,1001,1001,1111,1111,1111,1111,1111,1111, %U A265561 1111,1111,1111,1111,1111,1111,1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,1221,2002,2002,2002,2002,2112,2112,2112 %N A265561 Smallest base-3 palindrome m >= n, written in base 3. %Y A265561 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265561 nonn,base %O A265561 0,3 %A A265561 _N. J. A. Sloane_, Dec 10 2015