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A146925
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Number of n X n binary arrays with all ones connected only in a 1001-1111-1001 pattern in any orientation.
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0
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1, 1, 1, 5, 13, 37, 117, 629, 5685, 56354, 602084, 7772959, 142197171, 3619248864, 116780772318, 4548516587793, 219091485187390
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OFFSET
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1,4
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.1.1.1.0.1.0.0.1
.0.1.0.0.1.1.1.1
.0.1.0.0.1.0.0.1
.1.1.1.0.0.0.0.0
.0.0.0.0.0.1.1.1
.1.0.0.1.0.0.1.0
.1.1.1.1.0.0.1.0
.1.0.0.1.0.1.1.1
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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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