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Search: id:A147195
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| A147195 |
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 45, 45, 217, 217, 1805, 1805, 29665, 29665, 431133, 431133, 7762019, 7762019, 212346129, 212346129
(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
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.1.1.1.0.0.0.1.1.1
.1.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.1.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
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CROSSREFS
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Sequence in context: A146860 A146185 A147399 this_sequence A147045 A146065 A146242
Adjacent sequences: A147192 A147193 A147194 this_sequence A147196 A147197 A147198
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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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