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A140937 Number of 5 X 11 matrices with elements in 0..n with each row and each column in nondecreasing order. 5,11,n can be permuted, see formula. 0
1, 4368, 4504864, 1837984512, 381644355456, 46960429261824, 3792054662892288, 216147115784860416, 9183250377581777952, 303282730418598205184, 8048657076493567752960 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

FORMULA

(empirical) set p,q,r to n,11,5 (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: A125825 A031564 A217345 * A327789 A043598 A043843

Adjacent sequences:  A140934 A140935 A140936 * A140938 A140939 A140940

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 05 2008

STATUS

approved

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Last modified January 23 20:39 EST 2021. Contains 340386 sequences. (Running on oeis4.)