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 A113564 #3 Dec 05 2013 19:57:07 %S A113564 9,190,129,10092,100090,1000092,1000069,100000096,100000089, %T A113564 10000000090,10000000109,1000000000092,1000000000129,100000000000096, %U A113564 1000000000000095,10000000000000096,10000000000000169 %N A113564 Least multiple of n in which the n-th digit from left is 9. %e A113564 a(4)= 10092, in which the fourth digit is 9. %Y A113564 Cf. A113556, A113557, A113558, A113559, A113560, A113561, A113562, A113563. %K A113564 base,easy,nonn %O A113564 1,1 %A A113564 _Amarnath Murthy_, Nov 06 2005 %E A113564 More terms from Peter Soung (soung3(AT)hotmail.com), Jan 23 2006