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A259420
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Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111
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1
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13, 243, 12953, 1990133, 873754597, 1101527291223, 3975872829274865, 41147590225188806309, 1220087829652769318601383, 103689338398592714772850061461, 25251868912730969096083539641411367
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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
..1..1..1..1....0..0..0..0....0..0..1..1....0..0..1..1....1..1..1..0
..0..0..0..0....1..0..0..1....0..0..0..0....0..0..1..0....1..0..1..0
..0..0..1..0....0..0..1..1....1..1..1..0....0..0..1..1....1..0..1..1
..1..1..1..1....0..0..0..1....1..0..1..0....1..0..0..0....1..1..1..0
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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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