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A147095
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 3, 3, 5, 7, 23, 43, 97, 209, 521, 1391, 4635, 14277, 54221, 189323, 860301, 3540691, 18022413, 86154579, 507402119, 2814410215, 19349048791, 125262392501
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OFFSET
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1,5
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.1.1.1.1.0
.0.0.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.0.0
.0.1.1.1.1.0.0.0
.0.0.0.0.0.0.0.0
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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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