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A147088
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 10001-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 7, 1, 22, 5, 57, 13, 165, 33, 836, 133, 3941, 443, 19907, 1649, 132005
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,9
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EXAMPLE
| Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.1.1.1.0.0
.1.1.0.0.0.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.0.0.0.1.1
.0.0.1.1.1.1.1.0.0
.0.0.1.0.0.0.1.0.0
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CROSSREFS
| Sequence in context: A009001 A093178 A093411 * A118402 A122383 A136180
Adjacent sequences: A147085 A147086 A147087 * A147089 A147090 A147091
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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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