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A140941 Number of 9 X 11 matrices with elements in 0..n with each row and each column in nondecreasing order. 9,11,n can be permuted, see formula. 0
1, 167960, 4936848280, 44648855844320, 165848175033726640, 303282730418598205184, 309490028060407426691200 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
(empirical) set p,q,r to n,11,9 (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: A247994 A235741 A236081 * A186550 A151618 A156426
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 05 2008
STATUS
approved

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Last modified May 19 11:03 EDT 2024. Contains 372683 sequences. (Running on oeis4.)