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Search: id:A147262
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| A147262 |
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 199, 377, 3217, 8011, 104473, 273171, 9678777, 30911627, 4517322323, 18623780151, 3664520343941, 18523730792349, 4450318556374425, 27331408113246915
(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
.0.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.0.0.0.1.1
.0.1.1.1.0.1.1.1.0
.1.0.0.1.0.1.0.0.1
.1.1.1.0.0.0.1.1.1
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
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CROSSREFS
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Sequence in context: A142749 A142123 A046006 this_sequence A106759 A004926 A004946
Adjacent sequences: A147259 A147260 A147261 this_sequence A147263 A147264 A147265
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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), Nov 04 2008
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