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 A083469 #10 Aug 25 2014 11:55:04 %S A083469 1,16,107,1358,197529,127572,3173145597388,12345679,109739369, %T A083469 1918171615141312111,183561974195583011010,109342591563786, %U A083469 1475516627031778546999,209162330374451586572798694 %N A083469 Smallest k such that n*k is a reverse concatenation of n consecutive natural numbers. a(n) = A083468(n)/n. %Y A083469 Cf. A077306, A075000, A075001, A083468. %K A083469 base,nonn %O A083469 1,2 %A A083469 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003 %E A083469 More terms from _Max Alekseyev_, Jun 06 2009