id:A140910 - OEIS Search Results

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Number of 6 X 7 matrices with elements in 0..n with each row and each column in nondecreasing order. 6,7,n can be permuted, see formula.

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1, 1716, 736164, 131589315, 12544848030, 739309710568, 29706808370096, 872299918503728, 19702998159210080, 356031798904887040, 5307612509828239104, 66906538465238667936, 727646448874213295856, 6941725172140873448400 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,7,6 (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: A129540 A008744 A024408 this_sequence A025039 A068303 A048958` `Adjacent sequences: A140907 A140908 A140909 this_sequence A140911 A140912 A140913`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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