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 A173481 #2 Mar 30 2012 19:00:22 %S A173481 10,100,3000,10000,100000,3000000,70000000,100000000,9000000000, %T A173481 10000000000,1100000000000,3000000000000,130000000000000, %U A173481 700000000000000 %N A173481 a(n) = the smallest number ending in n zeros divisible by n. %C A173481 See A173478 - A173486. %K A173481 nonn %O A173481 1,1 %A A173481 _Jaroslav Krizek_, Mar 04 2010