A203560 Number of nX4 0..2 arrays with row sums equal and column sums equal

3, 33, 177, 5673, 32613, 513903, 7343451, 185804265, 1849858773, 30348858003, 499616140191, 10882786433775, 141444270208647, 2412815237573445, 41425627536496497, 824284992576210537, 12447291755448613317

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 A370083

Adjacent sequences: A203557 A203558 A203559 * A203561 A203562 A203563

Keyword

nonn

Author

R. H. Hardin Jan 03 2012

Status

approved