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A146373
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Number of n X n binary arrays with all ones connected only in a 0100-1111-0100 pattern in any orientation.
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0
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1, 1, 1, 9, 25, 125, 1331, 18779, 389231, 11969301, 573650431, 41782304071, 4475707668912, 731606853804073, 181071469572900858
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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
.0.1.0.0.0.0.0.0
.1.1.1.1.0.0.0.0
.0.1.0.0.0.0.1.0
.0.0.0.0.0.1.1.1
.0.1.0.0.1.0.1.0
.1.1.1.0.1.0.1.0
.0.1.0.1.1.1.0.0
.0.1.0.0.1.0.0.0
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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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