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A146919
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111-0110 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 4, 8, 13, 37, 82, 203, 410, 1390, 3260, 13938, 41809, 202082, 670860, 3891211
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OFFSET
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1,8
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.0.1.1.0.0.0
.0.0.1.1.1.1.0.0
.0.1.0.1.1.0.1.0
.1.1.1.0.0.1.1.1
.1.1.1.0.0.1.1.1
.0.1.0.1.1.0.1.0
.0.0.1.1.1.1.0.0
.0.0.0.1.1.0.0.0
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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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