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A146719 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-1111-1000 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 39, 39, 155, 155, 745, 745 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,13
LINKS
EXAMPLE
Maximal 13 X 13 example
.0.0.0.0.0.1.0.1.0.0.0.0.0
.0.0.1.1.1.1.0.1.1.1.1.0.0
.0.1.0.0.1.1.0.1.1.0.0.1.0
.0.1.0.0.0.0.0.0.0.0.0.1.0
.0.1.1.0.0.0.0.0.0.0.1.1.0
.1.1.1.0.0.0.0.0.0.0.1.1.1
.0.0.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.0.0.0.0.0.0.0.1.1.1
.0.1.1.0.0.0.0.0.0.0.1.1.0
.0.1.0.0.0.0.0.0.0.0.0.1.0
.0.1.0.0.1.1.0.1.1.0.0.1.0
.0.0.1.1.1.1.0.1.1.1.1.0.0
.0.0.0.0.0.1.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A282501 A147167 A146647 * A147469 A146274 A147037
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
EXTENSIONS
Repaired example. - R. H. Hardin, Nov 05 2008
STATUS
approved

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Last modified July 17 05:50 EDT 2024. Contains 374360 sequences. (Running on oeis4.)