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A146612 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0110 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 53, 53, 329, 329, 4465, 4465, 97649, 97649, 2836795, 2836795, 117091945, 117091945 (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

.0.0.0.1.0.1.0.0.0

.1.1.1.1.0.1.1.1.1

.0.1.1.0.0.0.1.1.0

.0.0.0.0.0.0.0.0.0

.0.1.1.0.0.0.1.1.0

.1.1.1.1.0.1.1.1.1

.0.0.0.1.0.1.0.0.0

.0.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A146841 A147180 A146644 * A146849 A146716 A146399

Adjacent sequences:  A146609 A146610 A146611 * A146613 A146614 A146615

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 25 02:55 EDT 2022. Contains 354047 sequences. (Running on oeis4.)