A140941 - OEIS

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A140941

Number of 9 X 11 matrices with elements in 0..n with each row and each column in nondecreasing order. 9,11,n can be permuted, see formula.

1, 167960, 4936848280, 44648855844320, 165848175033726640, 303282730418598205184, 309490028060407426691200 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,11,9 (in any order) in s=p+q+r-1; a(n) = product {i in 0..r-1} (binomial(s,p+i)*i!/(s-i)^(r-i-1))`
	CROSSREFS	`Sequence in context: A185803 A187170 A047829 * A186550 A151618 A156426` `Adjacent sequences: A140938 A140939 A140940 * A140942 A140943 A140944`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified February 15 04:23 EST 2012. Contains 205694 sequences.