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A203560 Number of nX4 0..2 arrays with row sums equal and column sums equal 1
3, 33, 177, 5673, 32613, 513903, 7343451, 185804265, 1849858773, 30348858003, 499616140191, 10882786433775, 141444270208647, 2412815237573445, 41425627536496497, 824284992576210537, 12447291755448613317 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A203564

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..39

EXAMPLE

Some solutions for n=5

..1..0..2..1....0..1..2..1....1..1..1..1....2..1..1..0....2..0..0..2

..0..2..0..2....0..0..2..2....0..0..2..2....1..0..1..2....2..0..2..0

..0..2..2..0....1..0..1..2....1..2..1..0....2..1..0..1....1..1..1..1

..2..1..1..0....2..2..0..0....1..2..0..1....0..1..1..2....0..2..0..2

..2..0..0..2....2..2..0..0....2..0..1..1....0..2..2..0....0..2..2..0

CROSSREFS

Sequence in context: A062215 A279885 A132122 * A289083 A195578 A331193

Adjacent sequences:  A203557 A203558 A203559 * A203561 A203562 A203563

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2012

STATUS

approved

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Last modified September 21 00:14 EDT 2021. Contains 347596 sequences. (Running on oeis4.)