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A146383 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 6, 1, 20, 13, 138, 69, 1792, 528, 26977, 7033, 655185, 141904, 24548006, 4322355, 1409242126, 197401178, 123270232283, 13868215311, 16071746508178, 1479290583806, 3212023185510693 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.1.1.0.0.0

.1.0.1.1.1.1.0.1

.1.1.0.0.0.0.1.1

.1.1.0.0.0.0.1.1

.1.0.1.1.1.1.0.1

.0.0.0.1.1.0.0.0

.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A200091 A180733 A161151 * A264313 A096130 A120666

Adjacent sequences:  A146380 A146381 A146382 * A146384 A146385 A146386

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 23 11:47 EDT 2019. Contains 326222 sequences. (Running on oeis4.)