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 A120673 #3 Mar 30 2012 17:36:44 %S A120673 1,12,132,12324,123540,1234560,122365740,123487560,1234759680 %N A120673 Least number including digits 1,2,...,n and divisible by each of 1,2,...,n. %C A120673 The first three terms are Lynch-Bell numbers (A115569). %e A120673 a(4) = 12324 as it is the least positive integer including at least one of each decimal digit 1, 2, 3 and 4, which is also divisible by each of these same numbers. %Y A120673 Cf. A120674 (same but require distinct digits), A115569. %K A120673 base,fini,full,nonn %O A120673 1,2 %A A120673 _Rick L. Shepherd_, Jun 23 2006