A162447 - OEIS

%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