%I #14 Jun 16 2016 03:10:42

%S 1,12,160,2688,55296,1351680,38338560,1238630400,44920995840,

%T 1807409479680,79906524364800,3850733459865600,200907832688640000,

%U 11282983883794022400,678650586195610828800,43527244493925384192000

%N The second right hand column of triangle A167557.

%C Triangle A167557 is the lower left triangle of the ED1 array A167546.

%H G. C. Greubel, <a href="/A167558/b167558.txt">Table of n, a(n) for n = 2..150</a>

%H A. Ryabov, P. Chvosta, <a href="http://arxiv.org/abs/1402.1949">Tracer dynamics in a single-file system with absorbing boundary</a>, arXiv preprint arXiv:1402.1949 [cond-mat.stat-mech], 2014.

%F a(n) = 4^(n-2)*(n-2)!*(2*n-3)!/(2*n-4)!.

%F (-2*n+5)*a(n) +4*(2*n-3)*(n-2)*a(n-1)=0. - _R. J. Mathar_, Apr 01 2015

%t Table[4^(n-2) (n-2)! (2n-3)!/(2n-4)!,{n,2,20}] (* _Harvey P. Dale_, Aug 21 2013 *)

%Y A167546 is the ED1 array.

%Y Equals the second right hand column of triangle A167557.

%K easy,nonn

%O 2,2

%A _Johannes W. Meijer_, Nov 10 2009