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A146744
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 17, 29, 123, 759, 4287, 32985, 430679, 4420973, 81497997, 1458257461, 41635242773
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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
.1.1.1.0.1.1.1.1
.1.1.1.1.0.1.1.1
.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.1
.1.1.1.1.0.1.1.1
.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.1
.1.1.1.1.0.1.1.1
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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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