id:A140924 - OEIS Search Results

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

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1, 48620, 449141836, 1371597504992, 1832516612010448, 1274867710694037824, 520384188062967417280 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,9,9 (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: A083627 A024753 A024761 this_sequence A048341 A067869 A061737` `Adjacent sequences: A140921 A140922 A140923 this_sequence A140925 A140926 A140927`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.