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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
OFFSET
1,6
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
KEYWORD
nonn
AUTHOR
STATUS
approved