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A222631
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Number of nX4 0..1 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order
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1
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4, 10, 34, 161, 707, 3309, 16892, 89384, 465258, 2414240, 12658133, 66882546, 353898321, 1874207359, 9950624881, 52968141606, 282452336722, 1508213363988, 8064519904852, 43179574656064, 231467793567740, 1242085617391923
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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....0..0..1..1....0..0..0..0....0..1..0..0....0..0..1..1
..0..0..1..1....1..1..1..1....0..0..0..0....0..0..0..0....0..1..1..1
..0..0..1..1....1..1..1..1....0..1..0..0....0..0..0..0....0..1..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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