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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 (list; graph; refs; listen; history; text; internal format)
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: A068114 A272109 A203316 * A089639 A269091 A204973

Adjacent sequences:  A202679 A202680 A202681 * A202683 A202684 A202685

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 22 2011

STATUS

approved

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Last modified July 8 18:44 EDT 2020. Contains 335524 sequences. (Running on oeis4.)