id:A140916 - OEIS Search Results

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Number of 7 X 8 matrices with elements in 0..n with each row and each column in nondecreasing order. 7,8,n can be permuted, see formula.

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1, 6435, 9202050, 4971151900, 1318349483880, 201299981193168, 19702998159210080, 1335119245893326400, 66345156372852988800 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,8,7 (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: A031578 A104374 A104318 this_sequence A025040 A074978 A105377` `Adjacent sequences: A140913 A140914 A140915 this_sequence A140917 A140918 A140919`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.