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A146916
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 3, 1, 5, 9, 25, 65, 311, 777, 5163, 19629, 179101, 938309, 11522939, 83049733, 1385281995, 13583413581, 310426685067, 4145583315227, 129859229238145
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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
.0.0.1.0.0.0.1.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.1.0.0.0.1.0.0
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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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