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A146700 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 329, 329, 4359, 4359, 91969, 91969, 2747799, 2747799, 116126725, 116126725 (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

.0.1.0.0.0.0.0.1.0

.1.1.1.1.0.1.1.1.1

.0.0.1.1.0.1.1.0.0

.0.0.0.0.0.0.0.0.0

.0.0.1.1.0.1.1.0.0

.1.1.1.1.0.1.1.1.1

.0.1.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A146628 A146636 A146833 * A146708 A146463 A146841

Adjacent sequences:  A146697 A146698 A146699 * A146701 A146702 A146703

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)