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A146824
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 193, 369, 2631, 6147, 72935, 183013, 4104827, 12415887, 1843421399, 7169739931, 1106512780955, 5150025315155, 883358137678737, 4992528269858869
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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
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
.0.0.0.0.0.0.0.0.0
.0.0.0.1.0.1.0.0.0
.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
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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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