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 A265549 #4 Dec 10 2015 10:37:19 %S A265549 0,1,2,3,4,11,11,22,33,44,22,22,22,33,44,33,33,33,33,44,44,44,44,44, %T A265549 44,101,101,202,303,404,111,111,212,313,414,121,121,222,323,424,131, %U A265549 131,232,333,434,141,141,242,343,444,202,202,202,303,404,212,212,212,313,414,222,222,222,323,424,232,232,232,333,434 %N A265549 a(n) = smallest base-5 palindrome m >= n such that every base-5 digit of n is <= the corresponding digit of m; m is written in base 5. %Y A265549 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265549 nonn,base %O A265549 0,3 %A A265549 _N. J. A. Sloane_, Dec 10 2015