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A140917 Number of 8 X 8 matrices with elements in 0..n with each row and each column in nondecreasing order. 8,8,n can be permuted, see formula. 0
1, 12870, 34763300, 33803832920, 15484613937936, 3940599631842016, 623055648083552320, 66345156372852988800 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
(empirical) set p,q,r to n,8,8 (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: A245861 A068359 A177310 * A351487 A177311 A177312
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 05 2008
STATUS
approved

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Last modified February 25 11:01 EST 2024. Contains 370324 sequences. (Running on oeis4.)