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A147179
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0101 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 21, 565, 1145, 12479, 31399, 640435, 1895643, 107049481, 386487735, 48463219765, 218714170211, 47470279346001, 263294969585091, 82919443144541165, 560855115342510007
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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
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.1.0.0.1.1.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
.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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