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A147214 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0111-0011 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 23, 23, 55, 55, 315, 315, 2117, 2117, 14227 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.0.0.1.1.0.0.0.1.1.0.0
.0.0.1.1.0.0.0.1.1.0.0
.1.1.0.1.1.0.1.1.0.1.1
.1.1.1.0.1.0.1.0.1.1.1
.0.0.1.1.0.0.0.1.1.0.0
.0.0.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.0.0.1.1.0.0
.1.1.1.0.1.0.1.0.1.1.1
.1.1.0.1.1.0.1.1.0.1.1
.0.0.1.1.0.0.0.1.1.0.0
.0.0.1.1.0.0.0.1.1.0.0
CROSSREFS
Sequence in context: A146695 A146442 A147128 * A146820 A146663 A146394
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)