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 A265565 #4 Dec 10 2015 10:52:07 %S A265565 0,1,2,3,4,11,11,22,22,22,22,22,22,33,33,33,33,33,33,44,44,44,44,44, %T A265565 44,101,101,111,111,111,111,111,121,121,121,121,121,131,131,131,131, %U A265565 131,141,141,141,141,141,202,202,202,202,202,202,212,212,212,212,212,222,222,222,222,222,232,232,232,232,232,242,242 %N A265565 Smallest base-5 palindrome m >= n, written in base 5. %Y A265565 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265565 nonn,base %O A265565 0,3 %A A265565 _N. J. A. Sloane_, Dec 10 2015