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.

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

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: A180733 A334504 A161151 * A264313 A096130 A120666

Adjacent sequences: A146380 A146381 A146382 * A146384 A146385 A146386

Keyword

nonn

Author

R. H. Hardin

Status

approved