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Search: id:A147393
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| A147393 |
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111-0001-0001 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 13, 19, 229, 391, 2411, 4925
(list; graph; listen)
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OFFSET
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1,9
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EXAMPLE
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Maximal 9 X 9 example
.1.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
.1.0.0.1.0.1.0.0.1
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
.0.0.0.1.0.1.0.0.0
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CROSSREFS
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Sequence in context: A090258 A153266 A166664 this_sequence A088187 A146047 A145944
Adjacent sequences: A147390 A147391 A147392 this_sequence A147394 A147395 A147396
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net)
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