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 A071269 #5 Dec 05 2013 19:55:20 %S A071269 1,12,123,12345,123456,123456789,12345678910,123456789101112, %T A071269 123456789101112131415,123456789101112131415161718, %U A071269 1234567891011121314151617181920,12345678910111213141516171819202122232425 %N A071269 Terms of A007908 which are divisible by their index. %Y A071269 Cf. A007908. %K A071269 base,nonn %O A071269 1,2 %A A071269 _Amarnath Murthy_, Jun 01 2002 %E A071269 More terms from _Sascha Kurz_, Jan 02 2003