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Search: id:A146588
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| A146588 |
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111-0100 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 301, 301, 4891, 4891, 104131, 104131, 3555075, 3555075, 179509487, 179509487, 14641599949
(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
.0.0.1.0.0.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.1.1.0.0.0.1.1.0
.0.0.0.0.0.0.0.0.0
.0.1.1.0.0.0.1.1.0
.1.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
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CROSSREFS
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Sequence in context: A146857 A146668 A146732 this_sequence A146628 A146636 A146833
Adjacent sequences: A146585 A146586 A146587 this_sequence A146589 A146590 A146591
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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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