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A260608
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Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010001 or 00010101
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1
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2246, 5418, 19069, 59758, 217376, 727342, 2707758, 8855024, 33286034, 110210856, 412748296, 1357891144, 5097313270, 16821243128, 63055195644, 207867167400, 779656269748, 2570612995104, 9639618875124, 31789508626272, 119214975682522
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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
..1..0..0..0..0..0..0..0..0....0..0..0..1..0..1..0..0..0
..0..1..0..0..0..1..0..1..0....1..0..1..0..0..0..1..0..1
..1..0..1..0..1..0..1..0..1....0..1..0..0..0..1..0..1..0
..0..0..0..1..0..0..0..0..0....0..0..0..0..1..0..0..0..1
..0..0..1..0..0..0..1..0..0....0..1..0..1..0..0..0..1..0
..0..1..0..1..0..1..0..1..0....1..0..1..0..0..0..1..0..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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