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A202682
Number of nX4 0..3 arrays with row sums equal and column sums equal
1
4, 96, 832, 89520, 389704, 39506424, 235092820, 84143001856, 158178730792, 58325025609436, 113966068418140, 139531230013836984, 86009870625207052, 126568039998320295184, 67124345535323038912, 293815852611183910971392
OFFSET
1,1
COMMENTS
Column 4 of A202686
LINKS
EXAMPLE
Some solutions for n=3
..1..3..3..1....2..3..2..1....1..1..3..3....2..2..0..0....0..2..0..2
..2..0..3..3....3..0..3..2....3..3..1..1....0..0..2..2....0..0..3..1
..3..3..0..2....1..3..1..3....2..2..2..2....1..1..1..1....3..1..0..0
CROSSREFS
Sequence in context: A272109 A203316 A359653 * A089639 A269091 A204973
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 22 2011
STATUS
approved