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A147249
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11100-00100-00111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 13, 41, 41, 245, 245, 1633, 1633, 20989, 20989, 305457, 305457, 6244799, 6244799, 168722653, 168722653
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,11
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EXAMPLE
| Maximal 11 X 11 example
.0.0.0.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.0.0.0.0.0.1.1.1
.0.0.1.0.0.0.0.0.1.0.0
.0.0.1.1.1.0.1.1.1.0.0
.0.0.0.0.0.0.0.0.0.0.0
.0.0.1.1.1.0.1.1.1.0.0
.0.0.1.0.0.0.0.0.1.0.0
.1.1.1.0.0.0.0.0.1.1.1
.0.0.0.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0.0.0.0
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CROSSREFS
| Sequence in context: A166545 A022347 A026907 * A147013 A147187 A147069
Adjacent sequences: A147246 A147247 A147248 * A147250 A147251 A147252
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008
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