A172663 - OEIS

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

%S 0,0,1,6152037276,2630024635942177123650,

%T 16157198427400511406055803977773761,

%U 1126052188643363954802820836947166068046894450600

%N Number of 3*n X n 0..2 arrays with row sums 6 and column sums 18

%H R. H. Hardin, <a href="/A172663/b172663.txt">Table of n, a(n) for n=1..11</a>

%K nonn

%O 1,4

%A _R. H. Hardin_ Feb 06 2010