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A162447
Denominators of the column sums of the ZG1 matrix
1
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.
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
KEYWORD
easy,frac,nonn
AUTHOR
Johannes W. Meijer, Jul 06 2009
STATUS
approved