A202682 Number of nX4 0..3 arrays with row sums equal and column sums equal

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

R. H. Hardin, Table of n, a(n) for n = 1..21

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

Adjacent sequences: A202679 A202680 A202681 * A202683 A202684 A202685

Keyword

nonn

Author

R. H. Hardin Dec 22 2011

Status

approved