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A140938 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, 12376, 32821152, 31803696288, 14675134144320, 3792054662892288, 612416828057104512, 66906538465238667936, 5247874388850386800416, 309490028060407426691200 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

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

Sequence in context: A179916 A236426 A235841 * A202563 A061731 A278892

Adjacent sequences:  A140935 A140936 A140937 * A140939 A140940 A140941

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 05 2008

STATUS

approved

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Last modified November 24 04:08 EST 2020. Contains 338607 sequences. (Running on oeis4.)