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A183478
Number of nX4 0..2 arrays with every element equal to either the sum mod 3 of its vertical neighbors or the sum mod 3 of its horizontal neighbors
1
7, 135, 587, 4015, 40073, 270549, 1942323, 15984991, 119888365, 894632985, 6977123487, 53362780811, 405255680609, 3117495042837, 23903072796727, 182681815961381, 1400954811635395, 10740879929227211, 82253911392409687
OFFSET
1,1
COMMENTS
Column 4 of A183483
LINKS
EXAMPLE
Some solutions for 6X4
..0..0..0..0....0..0..1..1....0..0..0..0....0..2..1..0....0..0..0..0
..2..2..0..2....1..0..1..1....1..2..0..0....0..2..1..0....0..0..1..1
..0..0..0..2....1..0..0..0....1..2..0..0....0..0..0..0....0..0..1..1
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..1..1....0..0..0..0
..0..0..0..2....2..1..2..2....0..0..0..2....0..0..0..0....1..1..0..1
..1..1..0..2....2..1..2..2....2..2..0..2....1..1..0..0....1..1..0..1
CROSSREFS
Sequence in context: A003374 A001533 A143181 * A292395 A081793 A296595
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2011
STATUS
approved