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A147228
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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 11011-01110 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 1, 14, 3, 43, 10, 138, 29, 612, 94, 3177, 321, 17102, 1262, 109974, 7231, 884546, 51504
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,7
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EXAMPLE
| Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.1.1.0.0
.0.1.0.1.1.1.0.1.0
.0.1.1.0.0.0.1.1.0
.0.0.1.0.0.0.1.0.0
.0.1.1.0.0.0.1.1.0
.0.1.0.1.1.1.0.1.0
.0.0.1.1.0.1.1.0.0
.0.0.0.0.0.0.0.0.0
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CROSSREFS
| Sequence in context: A147008 A147365 A147064 * A176729 A074643 A060794
Adjacent sequences: A147225 A147226 A147227 * A147229 A147230 A147231
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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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