id:A140928 - OEIS Search Results

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Number of 5 X 10 matrices with elements in 0..n with each row and each column in nondecreasing order. 5,10,n can be permuted, see formula.

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1, 3003, 2186184, 644195552, 98561919456, 9095857138368, 559611782036736, 24648355308799872, 819557814017595744, 21427584214357481888, 454924095627897307776, 8048657076493567752960, 121208942878147181041600, 1581318351414483181236000 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,10,5 (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: A094336 A100896 A140915 this_sequence A090162 A031818 A152207` `Adjacent sequences: A140925 A140926 A140927 this_sequence A140929 A140930 A140931`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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