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A146429
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Number of n X n binary arrays with all ones connected only in a 101-111-101 pattern in any orientation.
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0
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1, 1, 3, 9, 19, 53, 531, 5709, 48307, 490649, 11283333, 359196547, 11541091447, 440660012263, 27722494439108, 2548067434592087, 280390489794224900
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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
.1.1.1.0.0.1.0.1
.0.1.0.0.0.1.1.1
.1.1.1.0.0.1.0.1
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.1.0.1.0.1
.0.1.1.1.0.1.1.1
.0.1.0.1.0.1.0.1
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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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