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Number of 5*n X 15 0..3 arrays with row sums 3 and column sums n
1

%I #4 Mar 31 2012 12:35:41

%S 168168000,369820640830881240000,3937477620391471128913917360384000,

%T 85504723470329847456379126545730424791071000000,

%U 2789130810728711760475063805085713493445792640582613331968000

%N Number of 5*n X 15 0..3 arrays with row sums 3 and column sums n

%H R. H. Hardin, <a href="/A172784/b172784.txt">Table of n, a(n) for n=1..13</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2010