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 A113557 #7 Dec 05 2013 19:57:06 %S A113557 2,12,102,1012,100020,100002,1000062,10000032,100000062,10000000020, %T A113557 10000000032,100000000032,1000000000012,10000000000032, %U A113557 1000000000000020,1000000000000032,10000000000000152,100000000000000062,1000000000000000132 %N A113557 Least multiple of n in which the n-th digit from left is 2. %e A113557 a(4)= 1012, in which the fourth digit is 2. %Y A113557 Cf. A113556. %K A113557 base,easy,nonn %O A113557 1,1 %A A113557 _Amarnath Murthy_, Nov 06 2005 %E A113557 More terms from _R. J. Mathar_, Mar 13 2006 %E A113557 More terms from _Joshua Zucker_, May 03 2006