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A147061
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 1, 10, 1, 26, 1, 220, 25, 1716, 153, 23943, 1076, 485243, 13889, 10665112, 185108, 364094762, 4253039, 18497655767, 156271576, 1302420306077, 7383352471
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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EXAMPLE
| Maximal 9 X 9 example
.0.0.1.1.1.1.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.1.1.1.1.0.0
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CROSSREFS
| Sequence in context: A105086 A147362 A147225 * A147386 A145759 A131414
Adjacent sequences: A147058 A147059 A147060 * A147062 A147063 A147064
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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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