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A186956
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1/729 the number of (n+2)X5 0..2 arrays with each 3X3 subblock trace equal to some horizontal or vertical neighbor 3X3 subblock trace
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1
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831, 112707, 5903759, 373049827, 22237406277, 1352397401223, 81727735220193, 4949074316433529, 299482222563196133, 18126731672199604237, 1097073061584956632581, 66399141979879392520485
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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 4X5
..0..0..1..0..0....0..1..0..1..2....1..0..0..2..2....1..0..0..2..0
..0..0..0..0..2....0..0..0..2..2....0..0..1..0..1....0..0..1..1..0
..0..0..2..1..0....0..0..2..1..0....0..0..1..1..2....0..0..0..0..2
..0..0..2..0..1....0..0..2..0..1....0..0..2..1..0....0..0..2..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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