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A146906 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 7, 7, 13, 13, 27, 27, 81, 81, 287, 287, 1153, 1153, 4961, 4961 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,15
LINKS
EXAMPLE
Maximal 15 X 15 example
.0.0.0.0.0.1.0.0.0.1.0.0.0.0.0
.0.0.0.1.1.1.0.0.0.1.1.1.0.0.0
.0.0.0.0.1.1.1.0.1.1.1.0.0.0.0
.0.1.0.0.1.0.0.0.0.0.1.0.0.1.0
.0.1.1.1.0.0.0.0.0.0.0.1.1.1.0
.1.1.1.0.0.0.0.0.0.0.0.0.1.1.1
.0.0.1.0.0.0.0.0.0.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.0.0.0.0.0.0.1.0.0
.1.1.1.0.0.0.0.0.0.0.0.0.1.1.1
.0.1.1.1.0.0.0.0.0.0.0.1.1.1.0
.0.1.0.0.1.0.0.0.0.0.1.0.0.1.0
.0.0.0.0.1.1.1.0.1.1.1.0.0.0.0
.0.0.0.1.1.1.0.0.0.1.1.1.0.0.0
.0.0.0.0.0.1.0.0.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A083743 A126990 A128498 * A147449 A325344 A208474
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 May 21 07:02 EDT 2024. Contains 372729 sequences. (Running on oeis4.)