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Number of 2*n X 6 0..2 arrays with row sums 3 and column sums n
1

%I #4 Mar 31 2012 12:35:40

%S 20,16260,16214000,20982583300,31091880269520,50432680389260400,

%T 87186713382942888000,158040497103890978362500,

%U 297155971199028097720850000,575241665325478123466841078160

%N Number of 2*n X 6 0..2 arrays with row sums 3 and column sums n

%H R. H. Hardin, <a href="/A172661/b172661.txt">Table of n, a(n) for n=1..49</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2010