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A147000
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 5, 1, 11, 3, 31, 8, 90, 23, 344, 61, 1429, 183, 6788, 609, 37364, 3021, 252513
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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 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.1.1.1.1.0.0
.0.1.0.0.1.0.0.1.0
.0.1.0.0.1.0.0.1.0
.0.1.1.1.0.1.1.1.0
.0.1.0.0.1.0.0.1.0
.0.1.0.0.1.0.0.1.0
.0.0.1.1.1.1.1.0.0
.0.0.0.0.0.0.0.0.0
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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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