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A146865 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 25, 25, 193, 193, 1061, 1061, 19265, 19265, 384413, 384413, 13738057, 13738057, 820631045, 820631045 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

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

EXAMPLE

Maximal 9 X 9 example

.0.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0.0

.1.1.0.1.0.1.0.1.1

.1.1.1.1.0.1.1.1.1

.0.0.0.0.0.0.0.0.0

.1.1.1.1.0.1.1.1.1

.1.1.0.1.0.1.0.1.1

.0.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A022359 A147491 A147507 * A146740 A146724 A165846

Adjacent sequences:  A146862 A146863 A146864 * A146866 A146867 A146868

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified September 24 13:08 EDT 2021. Contains 347642 sequences. (Running on oeis4.)