id:A140906 - OEIS Search Results

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

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1, 924, 226512, 24293412, 1447482465, 55197331332, 1478619421136, 29706808370096, 469699956117392, 6062460972064640, 65728947490132992, 612416828057104512, 4995284546047230864, 36217696550300209296, 236405501218419838800, 1404221840699607829900 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,6,6 (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: A024758 A022053 A107517 this_sequence A159701 A115696 A066741` `Adjacent sequences: A140903 A140904 A140905 this_sequence A140907 A140908 A140909`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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