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Search: id:A147270
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| A147270 |
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111-0001 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 183, 351, 3185, 7397, 80251, 204181, 3751343, 10958987, 859595115, 3088432553, 597934255811, 2680671785861
(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
.0.0.0.1.0.1.0.0.0
.1.1.1.1.0.1.1.1.1
.1.0.0.0.0.0.0.0.1
.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
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
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CROSSREFS
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Sequence in context: A028676 A133609 A030465 this_sequence A147124 A061657 A164997
Adjacent sequences: A147267 A147268 A147269 this_sequence A147271 A147272 A147273
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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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