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A146171
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Number of n X n binary arrays with all ones connected only in a 110-100-111 pattern in any orientation.
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0
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1, 1, 9, 33, 89, 853, 34557, 906369, 18920177, 1254520087, 193995577775, 29705523106027, 5297235657600881
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OFFSET
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1,3
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.1.1.1.0.0.0.0.0
.1.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.1
.0.0.0.0.0.1.1.1
.0.0.1.1.1.0.0.0
.1.1.0.0.1.0.1.1
.1.0.0.1.1.0.0.1
.1.1.1.0.0.1.1.1
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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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