id:A140926 - OEIS Search Results

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Number of 3 X 10 matrices with elements in 0..n with each row and each column in nondecreasing order. 3,10,n can be permuted, see formula.

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1, 286, 26026, 1184183, 33157124, 644195552, 9386849472, 108284013552, 1028698128744, 8291930371088, 58043512597616, 359423289546776, 1998551478139216, 10102567911472960, 46904779588981600, 201759529849663500, 810005171308207875, 3054446745056957250 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,10,3 (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: A072817 A117994 A130433 this_sequence A157997 A063362 A159949` `Adjacent sequences: A140923 A140924 A140925 this_sequence A140927 A140928 A140929`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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