A162447 Denominators of the column sums of the ZG1 matrix.

12, 720, 181440, 7257600, 399168000, 1307674368000, 73229764608000, 731699852083200, 229909239772692480000, 84300054583320576000000, 51186993142992253747200000, 21777738900836704321536000000

Offset: 2

Author

Johannes W. Meijer, Jul 06 2009

Keywords

• easy
• frac
• nonn

Comments

For the definition of the ZG1 matrix coefficients see A162446.

We define the columns sums by cs(n) = sum(ZG1[2*m-1,n], m = 1.. infinity) for n => 2.

Crossrefs

See A162446 for the numerators of the column sums.

Formula

a(n) = denom(cs(n)) and numer(cs(n)) = A162446(n).