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A147377
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 11, 15, 241, 427, 4185, 8653, 87751, 203323, 3730869, 9866343, 357089469, 1093277721, 68995024703, 247016437881, 25144161711781, 105091314370945
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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
.0.0.0.0.0.0.0.0.0
.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
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.1.1.0.0.0.1.1.0
.0.1.0.0.0.0.0.1.0
.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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