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 A043267 #4 Mar 30 2012 18:56:34 %S A043267 0,1,2,3,4,5,6,7,2,4,6,8,10,12,14,2,3,4,5,6,7,8,9,4,5,6,7,8,9,10,11,6, %T A043267 7,8,9,10,11,12,13,8,9,10,11,12,13,14,15,10,11,12,13,14,15,16,17,12, %U A043267 13,14,15,16,17,18,19,14,15,16,17,18,19,20,21 %N A043267 Sum of the digits of the n-th base 8 palindrome. %Y A043267 A029803 (base 8 palindromes) %K A043267 nonn,base %O A043267 1,3 %A A043267 _Clark Kimberling_