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A146193 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 13, 13, 31, 31, 85, 85, 561, 561, 4911, 4911, 35269, 35269 (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
.0.1.0.0.0.0.0.0.0.1.0
.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
.0.1.0.0.0.0.0.0.0.1.0
.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: A146176 A147136 A146844 * A146727 A146426 A146051
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2008
STATUS
approved

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Last modified March 29 21:18 EDT 2024. Contains 371281 sequences. (Running on oeis4.)