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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A183483

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

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

Adjacent sequences:  A183475 A183476 A183477 * A183479 A183480 A183481

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 05 2011

STATUS

approved

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Last modified December 3 16:20 EST 2020. Contains 338906 sequences. (Running on oeis4.)