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A146691
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 19, 31, 599, 1163, 13781, 34743, 686711, 2032193, 168115995, 630196685, 103169062863, 486468362253, 96427000262963, 558209750316079, 186248241738031493
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OFFSET
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1,7
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.1.1.0.0.1.1.0
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
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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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