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A183521
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Number of nX4 0..2 arrays with each element equal to either the sum mod 3 of its horizontal and vertical neighbors or the sum mod 3 of its diagonal and antidiagonal neighbors
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1
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7, 95, 543, 3507, 27609, 201833, 1521573, 11678037, 89238523, 683029435, 5235031077, 40141122349, 307807564417, 2360732530937, 18105826441313, 138867315400205, 1065099011259479, 8169267911756541, 62658120915577663
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for 3X4
..2..1..2..1....2..1..0..1....1..1..2..2....2..1..0..0....0..0..2..0
..1..1..0..2....2..2..1..0....0..1..2..0....1..2..2..0....1..0..2..1
..1..2..0..2....1..2..2..1....1..1..2..2....0..2..0..2....2..1..2..2
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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