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A147395
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111-0001-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 23, 39, 63, 165
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,10
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EXAMPLE
| Maximal 10 X 10 example
.0.0.0.0.1.1.1.0.0.0
.0.0.0.0.1.0.0.0.0.0
.0.0.0.0.1.0.1.0.0.0
.1.0.1.1.1.0.1.0.0.0
.1.0.0.0.0.0.1.1.1.1
.1.1.1.1.0.0.0.0.0.1
.0.0.0.1.0.1.1.1.0.1
.0.0.0.1.0.1.0.0.0.0
.0.0.0.0.0.1.0.0.0.0
.0.0.0.1.1.1.0.0.0.0
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CROSSREFS
| Sequence in context: A031023 A199714 A054302 * A144390 A024843 A183453
Adjacent sequences: A147392 A147393 A147394 * A147396 A147397 A147398
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net)
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