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A146176 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. 0
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; text; internal format)
OFFSET
1,11
LINKS
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
CROSSREFS
Sequence in context: A141245 A147032 A146261 * A147136 A146844 A146193
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2008
STATUS
approved

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Last modified February 21 16:55 EST 2024. Contains 370237 sequences. (Running on oeis4.)