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Search: id:A147320
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| A147320 |
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 6, 1, 33, 9, 187, 25, 1110
(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
.0.0.1.1.1.1.1.0.0
.0.0.0.0.1.0.0.0.0
.1.0.0.0.1.0.0.0.1
.1.0.0.0.1.0.0.0.1
.1.1.1.1.0.1.1.1.1
.1.0.0.0.1.0.0.0.1
.1.0.0.0.1.0.0.0.1
.0.0.0.0.1.0.0.0.0
.0.0.1.1.1.1.1.0.0
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CROSSREFS
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Sequence in context: A120101 A030524 A051930 this_sequence A038255 A075501 A089504
Adjacent sequences: A147317 A147318 A147319 this_sequence A147321 A147322 A147323
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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)
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