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A147366
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 01110-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 4, 7, 18, 27, 60, 127, 520, 1313, 5577, 14738, 65753, 214371, 1292619, 5259696, 36901354, 169889413, 1338225681, 7299428688
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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
.0.1.0.0.1.1.1.0
.1.1.0.1.1.1.1.1
.1.1.0.0.0.0.0.0
.1.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.1
.0.0.0.0.0.0.1.1
.1.1.1.1.1.0.1.1
.0.1.1.1.0.0.1.0
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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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