id:A140925 - OEIS Search Results

Search: id:A140925

Displaying 1-1 of 1 results found.

page 1

Number of 2 X 10 matrices with elements in 0..n with each row and each column in nondecreasing order. 2,10,n can be permuted, see formula.

+0
1

1, 66, 1716, 26026, 273273, 2186184, 14158144, 77364144, 367479684, 1551580888, 5924217936, 20734762776, 67255063876, 203982391536, 582806832960, 1578435172600, 4073755482225, 10064572367850, 23896002230100, 54709268263650, 121141951155225, 260114319363600 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`(empirical) set p,q,r to n,10,2 (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: A027785 A104673 A133318 this_sequence A017782 A035728 A114252` `Adjacent sequences: A140922 A140923 A140924 this_sequence A140926 A140927 A140928`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin rhh(at)cadence.com, Jul 05 2008`

page 1

Search completed in 0.002 seconds

Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

AT&T Labs Research