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A147468
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 57, 101, 607, 1089, 8859, 19351, 240245, 590155, 24829301, 73370321, 4764846299, 16592732065, 1205158717385, 4890998445663, 529813293025221, 2499121025302115, 491892443613075873
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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
.0.0.1.1.0.1.1.0.0
.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
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.1.1.1.1.0.1.1.1.1
.1.1.0.0.0.0.0.1.1
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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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