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A185530
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Number of (n+2)X7 binary arrays with each 3X3 subblock nonsingular
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1
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52662, 886926, 14532816, 230731304, 3749400138, 60674682444, 978050637454, 15816011545490, 255607860729284, 4128520011920866, 66715825040239470, 1078017197746908576, 17417146777474242918, 281426703318981682738
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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 4X7
..0..1..1..0..0..1..0....0..1..0..1..0..1..1....0..0..1..0..0..1..0
..0..0..1..1..0..1..1....0..1..1..0..1..0..1....0..1..0..0..1..1..1
..1..1..1..1..1..1..0....1..0..0..1..1..0..0....1..0..0..1..1..1..0
..0..1..1..0..0..1..0....0..1..0..0..1..1..0....0..1..1..0..1..0..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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