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Search: id:A147029
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| A147029 |
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 81, 81, 593, 593, 11281, 11281, 273235, 273235, 6759617, 6759617
(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
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.1.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.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: A146604 A147172 A146825 this_sequence A146258 A146173 A146190
Adjacent sequences: A147026 A147027 A147028 this_sequence A147030 A147031 A147032
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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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