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A146237 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 110-111-001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 37, 37, 167, 167, 1407, 1407, 11143, 11143, 90213, 90213, 1212859 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..25.

EXAMPLE

Maximal 11 X 11 example

.0.0.1.1.0.0.0.1.1.0.0

.0.0.0.1.1.0.1.1.0.0.0

.1.0.0.1.1.0.1.1.0.0.1

.1.1.1.0.0.0.0.0.1.1.1

.0.1.1.0.0.0.0.0.1.1.0

.0.0.0.0.0.0.0.0.0.0.0

.0.1.1.0.0.0.0.0.1.1.0

.1.1.1.0.0.0.0.0.1.1.1

.1.0.0.1.1.0.1.1.0.0.1

.0.0.0.1.1.0.1.1.0.0.0

.0.0.1.1.0.0.0.1.1.0.0

CROSSREFS

Sequence in context: A146876 A147206 A146852 * A282501 A147167 A146647

Adjacent sequences:  A146234 A146235 A146236 * A146238 A146239 A146240

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified May 18 16:24 EDT 2022. Contains 353816 sequences. (Running on oeis4.)