

A140932


Number of 9 X 10 matrices with elements in 0..n with each row and each column in nondecreasing order. 9,10,n can be permuted, see formula.


0




OFFSET

0,2


LINKS



FORMULA

(empirical) set p,q,r to n,10,9 (in any order) in s=p+q+r1; a(n) = product {i in 0..r1} (binomial(s,p+i)*i!/(si)^(ri1))


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



