A203034 - OEIS

%I #6 Mar 31 2012 12:36:54

%S 4,356,50716,7788648,1267847188,219705087676,39711390609500

%N Number of 4Xn 0..3 arrays with row sums equal and column sums unequal to adjacent columns

%C Row 4 of A203031

%e Some.solutions.for.n=5

%e ..2..3..3..1..1....2..2..3..3..2....3..1..1..0..2....2..2..0..0..3

%e ..1..1..2..3..3....2..2..2..3..3....0..2..1..2..2....2..1..3..1..0

%e ..0..3..1..3..3....1..2..3..3..3....3..1..2..1..0....0..1..1..3..2

%e ..2..1..3..1..3....1..2..3..3..3....2..1..2..2..0....1..0..2..1..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 27 2011