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Search: id:A147388
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| A147388 |
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 10001-11111-00100 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 6, 11, 18, 27, 65
(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
.0.0.1.1.1.1.1.0.0
.1.1.0.0.1.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.1.0.0.0.1.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.1.0.0.1.1
.0.0.1.1.1.1.1.0.0
.0.0.1.0.0.0.1.0.0
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CROSSREFS
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Sequence in context: A157656 A059100 A131512 this_sequence A003479 A093367 A054186
Adjacent sequences: A147385 A147386 A147387 this_sequence A147389 A147390 A147391
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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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