A172758 - OEIS

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

%S 20,16260,20933840,33833709700,62810128195920,127676780106968400,

%T 276686670102097569600,628807365128705353776900,

%U 1482500191777802616831698000,3598791496054686645936395190160

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

%H R. H. Hardin, <a href="/A172758/b172758.txt">Table of n, a(n) for n=1..49</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 06 2010