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A185558
1/3 the number of nX8 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors
0
43, 63544, 29168100, 15594228288, 7976049592892, 4170998760222200, 2159859526859795892
OFFSET
1,1
COMMENTS
Column 8 of A185559
EXAMPLE
Some solutions for 4X8 with a(1,1)=0
..0..0..0..1..2..2..2..2....0..0..0..1..0..2..2..2....0..0..0..1..1..0..0..0
..0..1..0..1..2..0..0..2....0..1..0..1..0..0..1..1....0..1..0..1..2..2..2..0
..0..1..0..1..0..1..2..2....0..1..0..1..2..2..2..1....0..1..0..1..0..0..1..1
..0..0..0..1..0..1..0..0....0..0..0..1..1..1..2..1....0..0..0..1..1..2..2..1
CROSSREFS
Sequence in context: A302484 A177488 A262648 * A155477 A212738 A291993
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 31 2011
STATUS
approved