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 A265569 #4 Dec 10 2015 10:52:56 %S A265569 0,1,2,3,4,5,6,11,11,22,22,22,22,22,22,22,22,33,33,33,33,33,33,33,33, %T A265569 44,44,44,44,44,44,44,44,55,55,55,55,55,55,55,55,66,66,66,66,66,66,66, %U A265569 66,101,101,111,111,111,111,111,111,111,121,121,121,121,121,121,121,131,131,131,131,131,131,131,141,141,141 %N A265569 Smallest base-7 palindrome m >= n, written in base 7. %Y A265569 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265569 nonn,base %O A265569 0,3 %A A265569 _N. J. A. Sloane_, Dec 10 2015