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A146176
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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 110-100-111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 13, 13, 31, 31, 79, 79, 513, 513, 4397, 4397, 30071, 30071
(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
.0.0.0.0.1.0.1.0.0.0.0
.1.0.0.1.1.0.1.1.0.0.1
.1.0.1.0.0.0.0.0.1.0.1
.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
.1.0.1.0.0.0.0.0.1.0.1
.1.0.0.1.1.0.1.1.0.0.1
.0.0.0.0.1.0.1.0.0.0.0
.0.0.1.1.1.0.1.1.1.0.0
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CROSSREFS
| Sequence in context: A141245 A147032 A146261 * A147136 A146844 A146193
Adjacent sequences: A146173 A146174 A146175 * A146177 A146178 A146179
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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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