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A146655 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0100-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 7, 7, 19, 19, 43, 43, 173, 173, 1027, 1027 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.0.0.1.0.1.0.1.0.1.0.0
.0.0.1.1.1.0.1.1.1.0.0
.1.1.0.0.1.0.1.0.0.1.1
.0.1.0.0.1.0.1.0.0.1.0
.1.1.1.1.0.0.0.1.1.1.1
.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.1.0.0.0.1.1.1.1
.0.1.0.0.1.0.1.0.0.1.0
.1.1.0.0.1.0.1.0.0.1.1
.0.0.1.1.1.0.1.1.1.0.0
.0.0.1.0.1.0.1.0.1.0.0
CROSSREFS
Sequence in context: A263795 A070925 A146687 * A146812 A147236 A146599
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified July 23 09:01 EDT 2024. Contains 374547 sequences. (Running on oeis4.)