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A147236
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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 1101-0111-0001 pattern in any orientation.
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 7, 7, 19, 19, 49, 49, 195, 195, 1111, 1111
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,11
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EXAMPLE
| Maximal 11 X 11 example
.0.0.1.1.1.0.1.1.1.0.0
.0.0.0.1.0.0.0.1.0.0.0
.1.0.0.1.1.0.1.1.0.0.1
.1.1.1.0.1.0.1.0.1.1.1
.1.0.1.1.0.0.0.1.1.0.1
.0.0.0.0.0.0.0.0.0.0.0
.1.0.1.1.0.0.0.1.1.0.1
.1.1.1.0.1.0.1.0.1.1.1
.1.0.0.1.1.0.1.1.0.0.1
.0.0.0.1.0.0.0.1.0.0.0
.0.0.1.1.1.0.1.1.1.0.0
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CROSSREFS
| Sequence in context: A146687 A146655 A146812 * A146599 A107222 A050613
Adjacent sequences: A147233 A147234 A147235 * A147237 A147238 A147239
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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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