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A241127
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Number of nX4 0..2 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..2 introduced in row major order
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1
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11, 325, 9773, 295584, 8974020, 272418756, 8270609664, 251096788713, 7623351508315, 231446775293031, 7026779711400192, 213334731852107120, 6476894113062087316, 196640073775126182008, 5970040263453594766199
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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=3
..0..1..2..0....0..1..2..0....0..1..0..1....0..0..1..0....0..0..0..1
..2..1..2..0....2..1..0..2....2..1..1..2....1..1..2..1....2..0..2..0
..1..2..0..1....0..2..2..1....0..1..0..1....2..0..0..2....0..2..1..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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