id:A140917 - OEIS Search Results

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

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1, 12870, 34763300, 33803832920, 15484613937936, 3940599631842016, 623055648083552320, 66345156372852988800 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,8,8 (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: A024752 A024760 A068359 this_sequence A031805 A158918 A162895` `Adjacent sequences: A140914 A140915 A140916 this_sequence A140918 A140919 A140920`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.