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 A165165 #3 Mar 30 2012 18:51:45 %S A165165 1,2,3,4,5,6,7,8,9,13,15,17,19,20,24,26,28,31,35,37,39,40,42,46,48,51, %T A165165 53,57,59,60,62,64,68,71,73,75,79,80,82,84,86,91,93,95,97,132,135,138, %U A165165 150,153,156,159,174,192,195,198,201,204,207,240,243,246,249,261,264 %N A165165 Numbers without repeated digits that yield only integers when the sum of the leftmost k digits is divided by k for all k = 1, 2, ... %C A165165 Contains exactly 673 terms. %H A165165 Harvey P. Dale, <a href="/A165165/b165165.txt">Table of n, a(n) for n = 1..673</a> %e A165165 603 is included because (1) none of its digits repeat, (2) the leftmost first digit is 6 which, divided by 1, yields an integer, (3) the sum of the leftmost 2 digits, i.e., 6+0=6, divided by 2 yields an integer, and (3) the sum of the leftmost 3 digits, i.e., 6+0+3=9, divided by 3 yields an integer. %K A165165 base,nonn,fini %O A165165 1,2 %A A165165 _Harvey P. Dale_, Sep 06 2009