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 A083468 #8 Aug 25 2014 11:54:42 %S A083468 1,32,321,5432,987645,765432,22212019181716,98765432,987654321, %T A083468 19181716151413121110,2019181716151413121110,1312111098765432, %U A083468 19181716151413121110987,2928272625242322212019181716 %N A083468 Smallest multiple of n which is the reverse concatenation of n consecutive numbers.0 if no such number exists. %Y A083468 Cf. A077306, A075000, A075001, A083469. %K A083468 base,nonn %O A083468 1,2 %A A083468 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003 %E A083468 More terms from _Sam Alexander_, Feb 27 2004