A162447 Denominators of the column sums of the ZG1 matrix

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

Offset

2,1

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.

Links

Table of n, a(n) for n=2..13.

Formula

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

Crossrefs

See A162446 for the numerators of the column sums.

Sequence in context: A000909 A375105 A358732 * A061025 A042749 A219568

Adjacent sequences: A162444 A162445 A162446 * A162448 A162449 A162450

Keyword

easy,frac,nonn

Author

Johannes W. Meijer, Jul 06 2009

Status

approved