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A147330
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 6, 13, 32, 43, 80, 143, 550, 1371, 5869, 15663, 62826, 179478, 939656, 3406007, 21134246, 88331414, 597297267
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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
.0.0.1.0.0.0.0.1.0
.1.1.1.1.1.0.0.1.0
.0.0.1.0.0.1.1.1.1
.0.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.1.0.0
.1.1.1.1.0.0.1.0.0
.0.1.0.0.1.1.1.1.1
.0.1.0.0.0.0.1.0.0
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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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