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 A080459 #3 Mar 30 2012 17:27:18 %S A080459 1,2,3,4,5,6,7,8,9,10,20,30,40,50,60,70,80,90,100,110,200,220,300,330, %T A080459 400,440,500,550,600,660,700,770,800,880,900,990,1000,1010,1020,1050, %U A080459 1100,1320,2000,2010,2020,2040,2200,2310,2640,3000,3030,3060,3300,3960 %N A080459 Trans-Harshad numerals: base-10 numerals that represent positive Harshad numbers in every base in which they occur. %C A080459 Harshad, or Niven, numbers are those that are divisible by the sum of their digits; see A005349 for base-10 Harshad numbers. %K A080459 base,nonn %O A080459 1,2 %A A080459 _Matthew Vandermast_, Mar 21 2003