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%I #2 Mar 30 2012 18:59:45
%S 12,720,181440,7257600,399168000,1307674368000,73229764608000,
%T 731699852083200,229909239772692480000,84300054583320576000000,
%U 51186993142992253747200000,21777738900836704321536000000
%N Denominators of the column sums of the ZG1 matrix
%C For the definition of the ZG1 matrix coefficients see A162446.
%C We define the columns sums by cs(n) = sum(ZG1[2*m-1,n], m = 1.. infinity) for n => 2.
%F a(n) = denom(cs(n)) and numer(cs(n)) = A162446(n).
%Y See A162446 for the numerators of the column sums.
%K easy,frac,nonn
%O 2,1
%A _Johannes W. Meijer_, Jul 06 2009
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