id:A140938 - OEIS Search Results

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Number of 6 X 11 matrices with elements in 0..n with each row and each column in nondecreasing order. 6,11,n can be permuted, see formula.

+0
1

1, 12376, 32821152, 31803696288, 14675134144320, 3792054662892288, 612416828057104512, 66906538465238667936, 5247874388850386800416, 309490028060407426691200 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,11,6 (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	`Adjacent sequences: A140935 A140936 A140937 this_sequence A140939 A140940 A140941` `Sequence in context: A077298 A045080 A096618 this_sequence A061731 A068676 A033669`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.

AT&T Labs Research