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A146901
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Number of n X n binary arrays with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.
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0
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1, 1, 1, 3, 9, 19, 49, 345, 3029, 26343, 253497, 4034589, 91237121, 2505865849, 83922611151, 3827327413577, 239094333954443, 19417775019886243
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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
.0.1.0.0.0.1.0.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.0
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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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