A202682 - OEIS

%I #5 Mar 31 2012 12:36:50

%S 4,96,832,89520,389704,39506424,235092820,84143001856,158178730792,

%T 58325025609436,113966068418140,139531230013836984,86009870625207052,

%U 126568039998320295184,67124345535323038912,293815852611183910971392

%N Number of nX4 0..3 arrays with row sums equal and column sums equal

%C Column 4 of A202686

%H R. H. Hardin, <a href="/A202682/b202682.txt">Table of n, a(n) for n = 1..21</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 22 2011