Search: id:A140915
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%I A140915
%S A140915 1,3003,2147145,614083470,90474964580,7997986868872,469699956117392,
%T A140915 19702998159210080,623055648083552320,15480536486999030720,
%U A140915 312230512837780450368,5247874388850386800416
%N A140915 Number of 6 X 8 matrices with elements in 0..n with each row and each 
               column in nondecreasing order. 6,8,n can be permuted, see formula.
%F A140915 (empirical) set p,q,r to n,8,6 (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))
%Y A140915 Sequence in context: A145304 A094336 A100896 this_sequence A140928 A090162 
               A031818
%Y A140915 Adjacent sequences: A140912 A140913 A140914 this_sequence A140916 A140917 
               A140918
%K A140915 nonn
%O A140915 0,2
%A A140915 Ron Hardin rhh(at)cadence.com, Jul 05 2008

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