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Search: id:A147493
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| A147493 |
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11101-10111 pattern in any orientation. |
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+0
1
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| 1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 9, 15, 23, 35, 101
(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
.0.0.1.0.1.1.1.0.0
.0.0.1.1.1.0.1.0.0
.1.1.0.0.0.0.0.1.1
.0.1.0.0.0.0.0.0.1
.1.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.0.1.0
.1.1.0.0.0.0.0.1.1
.0.0.1.0.1.1.1.0.0
.0.0.1.1.1.0.1.0.0
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CROSSREFS
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Sequence in context: A027688 A118403 A033498 this_sequence A147509 A057259 A045599
Adjacent sequences: A147490 A147491 A147492 this_sequence A147494 A147495 A147496
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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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