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 A118475 #7 Oct 13 2013 03:12:08
%S A118475 1,12,132,1432,15432,165432,1765432,18765432,198765432,11098765432,
%T A118475 1111098765432,112111098765432,11312111098765432,1141312111098765432,
%U A118475 115141312111098765432,11615141312111098765432
%N A118475 Write numbers from n down to 1 in decreasing order, then move the 1 to the front.
%t A118475 Table[FromDigits@ RotateRight@ Flatten@ Reverse@ IntegerDigits@ Range@n, {n, 17}] (* _Robert G. Wilson v_ *)
%K A118475 base,nonn,less
%O A118475 1,2
%A A118475 _Jamil da SIlva_, May 04 2006
%E A118475 Edited and extended by _Robert G. Wilson v_, May 13 2006