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 A082781 #8 Dec 05 2013 19:56:13 %S A082781 6,66,6006,606606,6006006006,60066066066006,60006060066006060006, %T A082781 6000006006006006006006000006,60000060066060066066066006066006000006 %N A082781 a(1) = 6, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1). %Y A082781 Cf. A082776, A082777, A082778, A082779, A082780, A082782, A082783. %K A082781 base,more,nonn %O A082781 1,1 %A A082781 _Amarnath Murthy_, Apr 19 2003 %E A082781 Corrected by _Ray Chandler_, Oct 13 2003 %E A082781 a(8)-a(9) from _Sean A. Irvine_, Apr 19 2010