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A147279
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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 17, 33, 105, 379, 919, 2871, 9565, 62893, 248053, 1633141, 8782131, 72370235
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,10
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EXAMPLE
| Maximal 10 X 10 example
.0.0.0.0.0.0.1.1.0.0
.0.0.0.0.0.0.1.0.0.0
.0.0.0.0.0.1.1.0.0.1
.0.0.0.0.1.1.0.1.1.1
.0.0.0.1.0.0.1.1.0.0
.0.0.1.1.0.0.1.0.0.0
.1.1.1.0.1.1.0.0.0.0
.1.0.0.1.1.0.0.0.0.0
.0.0.0.1.0.0.0.0.0.0
.0.0.1.1.0.0.0.0.0.0
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CROSSREFS
| Sequence in context: A127193 A197344 A146236 * A173788 A097478 A147026
Adjacent sequences: A147276 A147277 A147278 * A147280 A147281 A147282
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008
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