A203486 Number of nX3 0..2 arrays with row sums equal and column sums unequal to adjacent columns

12, 80, 624, 3760, 25002, 171068, 1107888, 7411872, 50469114, 335270710, 2266967088, 15497479060, 104719636176, 715192200880, 4919017621164, 33647413101184, 231673960276602, 1602349695229334, 11054192845643568

Offset

1,1

Comments

Column 3 of A203491

Links

R. H. Hardin, Table of n, a(n) for n = 1..106

Example

Some solutions for n=5
..0..0..1....1..2..2....1..1..0....2..1..0....2..1..2....1..1..0....1..0..2
..0..1..0....2..1..2....1..1..0....2..1..0....1..2..2....0..1..1....2..1..0
..0..1..0....2..2..1....1..1..0....2..1..0....1..2..2....2..0..0....2..0..1
..0..1..0....2..1..2....0..0..2....0..1..2....1..2..2....0..2..0....2..0..1
..1..0..0....2..1..2....2..0..0....0..1..2....1..2..2....2..0..0....2..1..0

Crossrefs

Sequence in context: A038734 A258591 A058962 * A187011 A277783 A009500

Adjacent sequences: A203483 A203484 A203485 * A203487 A203488 A203489

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved