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 A265550 #4 Dec 10 2015 10:32:34 %S A265550 0,1,2,3,4,5,7,7,14,21,28,35,14,14,14,21,28,35,21,21,21,21,28,35,28, %T A265550 28,28,28,28,35,35,35,35,35,35,35,37,37,74,111,148,185,43,43,80,117, %U A265550 154,191,49,49,86,123,160,197,55,55,92,129,166,203,61,61,98,135,172,209,67,67,104,141,178,215,74,74,74,111,148 %N A265550 a(n) = smallest base-6 palindrome m >= n such that every base-6 digit of n is <= the corresponding digit of m; m is written in base 10. %Y A265550 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265550 nonn,base %O A265550 0,3 %A A265550 _N. J. A. Sloane_, Dec 10 2015