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A275348
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Number of nX4 0..2 arrays with no element equal to any value at offset (-2,-1) (-2,1) or (-1,-2) and new values introduced in order 0..2.
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1
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14, 486, 1536, 6156, 31536, 175152, 982152, 5645376, 33154200, 197081664, 1176717272, 7054784192, 42406446716, 255340091420, 1538613779712, 9277198809020, 55956031182028, 337589432181096, 2036924853334720
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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..2..1. .0..1..0..0. .0..1..1..1. .0..0..1..0. .0..0..1..0
..2..0..2..2. .1..1..1..0. .0..0..1..2. .2..1..2..1. .1..1..1..1
..2..1..0..1. .0..2..2..2. .2..2..2..2. .2..2..1..2. .1..2..2..0
..1..0..1..0. .2..2..2..0. .2..2..1..0. .2..1..0..0. .2..2..0..0
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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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