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A209529
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Half the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having exactly two distinct clockwise edge differences
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1
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5, 25, 257, 6145, 262145, 25165825, 4294967297, 1649267441665, 1125899906842625, 1729382256910270465, 4722366482869645213697, 29014219670751100192948225, 316912650057057350374175801345, 7788445287802241442795744493830145
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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..2....0..1..2..1..2....1..0..1..2..1....1..0..1..2..1
..1..0..1..2..1....1..2..1..2..1....0..1..0..1..2....2..1..0..1..2
..2..1..0..1..2....2..1..2..1..0....1..2..1..0..1....1..2..1..2..1
..1..2..1..2..1....1..2..1..2..1....2..1..0..1..2....2..1..2..1..0
..0..1..0..1..2....0..1..2..1..0....1..0..1..2..1....1..2..1..2..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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