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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

Table of n, a(n) for n=1..22.

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

Adjacent sequences:  A146652 A146653 A146654 * A146656 A146657 A146658

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 5 11:35 EDT 2022. Contains 357255 sequences. (Running on oeis4.)