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 A265552 #4 Dec 10 2015 10:32:55 %S A265552 0,1,2,3,4,5,6,8,8,16,24,32,40,48,16,16,16,24,32,40,48,24,24,24,24,32, %T A265552 40,48,32,32,32,32,32,40,48,40,40,40,40,40,40,48,48,48,48,48,48,48,48, %U A265552 50,50,100,150,200,250,300,57,57,107,157,207,257,307,64,64,114,164,214,264,314,71,71,121,171,221,271,321 %N A265552 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 10. %Y A265552 Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509. %K A265552 nonn,base %O A265552 0,3 %A A265552 _N. J. A. Sloane_, Dec 10 2015