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A222643
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Number of nX2 0..2 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order
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1
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1, 1, 3, 12, 38, 124, 430, 1530, 5378, 18938, 67042, 238446, 849586, 3033214, 10851386, 38895414, 139634834, 502003486, 1807104810, 6512929766, 23498319154, 84864219966, 306764487338, 1109807490550, 4018136484386, 14558333191406
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OFFSET
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1,3
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COMMENTS
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LINKS
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EXAMPLE
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All solutions for n=3
..0..0....0..0....0..1
..0..0....0..0....1..1
..0..1....0..0....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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