id:A140911 - OEIS Search Results

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Number of 7 X 7 matrices with elements in 0..n with each row and each column in nondecreasing order. 7,7,n can be permuted, see formula.

+0
1

1, 3432, 2760615, 877262100, 142174944340, 13710834632352, 872299918503728, 39405996318420160, 1335119245893326400, 35384083398854927360, 758274102606038236608, 13494534142758137486784 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,7,7 (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: A031787 A024751 A024759 this_sequence A046253 A031824 A107537` `Adjacent sequences: A140908 A140909 A140910 this_sequence A140912 A140913 A140914`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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