Search: id:A140904
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%I A140904
%S A140904 1,210,13860,457380,9343620,133613766,1447482465,12544848030,90474964580,
%T A140904 559299781040,3031952379456,14675134144320,64344818940480,258616676126160,
%U A140904 962206162645860,3341308066756506,10904939897954025,33648885753232750,
               98669664990682500
%N A140904 Number of 4 X 6 matrices with elements in 0..n with each row and each 
               column in nondecreasing order. 4,6,n can be permuted, see formula.
%F A140904 (empirical) set p,q,r to n,6,4 (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 A140904 Sequence in context: A087977 A023905 A035840 this_sequence A092711 A089514 
               A014979
%Y A140904 Adjacent sequences: A140901 A140902 A140903 this_sequence A140905 A140906 
               A140907
%K A140904 nonn
%O A140904 0,2
%A A140904 Ron Hardin rhh(at)cadence.com, Jul 05 2008

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