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A199654
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Number of nX7 0..2 arrays with values 0..2 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors
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1
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365, 571530, 713445976, 898852775335, 1132589231853096, 1427019666767669979, 1797997097480559332224, 2265416280260844187870380, 2854348741463033805904551375, 3596383952736036093799275624989
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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..0..0..1..2..1..0....0..0..0..1..1..1..2....0..0..0..0..1..2..1
..0..1..0..2..0..2..1....0..1..0..2..0..0..2....0..1..1..1..2..2..1
..0..0..0..1..0..0..0....0..0..0..1..1..2..0....0..0..0..2..0..0..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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