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Search: id:A146724
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| A146724 |
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-0111 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 25, 25, 197, 197, 1531, 1531, 31791, 31791, 876801, 876801, 39890653, 39890653, 2918403939, 2918403939
(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
.1.0.1.1.0.1.1.0.1
.1.1.1.0.0.0.1.1.1
.0.0.0.0.0.0.0.0.0
.1.1.1.0.0.0.1.1.1
.1.0.1.1.0.1.1.0.1
.0.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0.0
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CROSSREFS
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Sequence in context: A147507 A146865 A146740 this_sequence A165846 A135218 A133507
Adjacent sequences: A146721 A146722 A146723 this_sequence A146725 A146726 A146727
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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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