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A241135
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Number of nX4 0..2 arrays with no element equal to the same number of vertical neighbors as horizontal neighbors, with new values 0..2 introduced in row major order
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1
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2, 17, 152, 1670, 19619, 238607, 2939027, 36470565, 454209512, 5665536042, 70725144550, 883230404813, 11031990457193, 137807268659287, 1721508492588267, 21505781617159089, 268661629731046770
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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 n=4
..0..1..1..1....0..0..0..1....0..0..0..1....0..0..1..1....0..0..1..1
..0..2..0..0....1..1..2..1....2..2..2..1....2..2..2..2....1..1..2..2
..0..2..1..1....2..2..2..2....0..2..0..0....0..1..1..1....0..2..0..1
..2..2..2..2....1..1..0..0....0..2..1..1....0..2..2..2....0..2..0..1
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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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