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A147171
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 193, 369, 2595, 6071, 68113, 166829, 3392025, 10054713, 1656174053, 6422563367, 1047960128407, 4842120420549, 791850842457727
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OFFSET
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1,9
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LINKS
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EXAMPLE
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Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.1.1.1.1.0.1.1.1.1
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0.0
.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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