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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
OFFSET
0,2
FORMULA
(empirical) set p,q,r to n,11,6 (in any order) in s=p+q+r-1; a(n) = Product {i=0..r-1} (binomial(s,p+i)*i!/(s-i)^(r-i-1)).
CROSSREFS
Sequence in context: A179916 A236426 A235841 * A202563 A061731 A278892
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 05 2008
STATUS
approved