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 A265553 #4 Dec 10 2015 10:38:30 %S A265553 0,1,2,3,4,5,6,11,11,22,33,44,55,66,22,22,22,33,44,55,66,33,33,33,33, %T A265553 44,55,66,44,44,44,44,44,55,66,55,55,55,55,55,55,66,66,66,66,66,66,66, %U A265553 66,101,101,202,303,404,505,606,111,111,212,313,414,515,616,121,121,222,323,424,525,626,131,131,232,333,434 %N A265553 a(n) = smallest base-7 palindrome m >= n such that every base-7 digit of n is <= the corresponding digit of m; m is written in base 7. %Y A265553 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265553 nonn,base %O A265553 0,3 %A A265553 _N. J. A. Sloane_, Dec 10 2015