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
KEYWORD
easy,frac,nonn
AUTHOR
Johannes W. Meijer, Jul 06 2009
STATUS
approved