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Search: id:A147205
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| A147205 |
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0101-0111 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 41, 107, 335, 953, 3255, 14559, 66659, 322289, 1582731, 8865325, 55810029
(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
.0.0.0.0.0.1.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.0.1.1.1.0.0.1
.0.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
.1.1.1.0.0.0.1.1.0
.1.0.0.1.1.1.0.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.1.0.0.0.0.0
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CROSSREFS
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Sequence in context: A133322 A146590 A098483 this_sequence A146875 A064276 A102724
Adjacent sequences: A147202 A147203 A147204 this_sequence A147206 A147207 A147208
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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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