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A146185
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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 110-111-100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 43, 43, 197, 197, 1293, 1293, 11263, 11263, 110807, 110807, 1310257
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,11
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EXAMPLE
| Maximal 11 X 11 example
.0.0.0.0.1.0.1.0.0.0.0
.0.0.1.1.1.0.1.1.1.0.0
.0.1.0.1.1.0.1.1.0.1.0
.0.1.1.0.0.0.0.0.1.1.0
.1.1.1.0.0.0.0.0.1.1.1
.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.0.0.0.0.0.1.1.1
.0.1.1.0.0.0.0.0.1.1.0
.0.1.0.1.1.0.1.1.0.1.0
.0.0.1.1.1.0.1.1.1.0.0
.0.0.0.0.1.0.1.0.0.0.0
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CROSSREFS
| Sequence in context: A146836 A146780 A146860 * A147399 A147195 A147045
Adjacent sequences: A146182 A146183 A146184 * A146186 A146187 A146188
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Oct 27 2008
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