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A147053
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1101-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 237, 237, 3143, 3143, 61525, 61525, 1581763, 1581763, 52804881, 52804881
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,9
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EXAMPLE
| Maximal 9 X 9 example
.1.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.0.0.1
.1.1.1.0.0.0.1.1.1
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.1.1.1.0.0.0.1.1.1
.1.0.0.0.0.0.0.0.1
.1.1.0.0.0.0.0.1.1
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CROSSREFS
| Sequence in context: A146801 A147203 A146777 * A146857 A146668 A146732
Adjacent sequences: A147050 A147051 A147052 * A147054 A147055 A147056
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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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