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A147469
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 39, 39, 155, 155, 1391, 1391, 19355, 19355, 265987, 265987, 4290113, 4290113, 107056079, 107056079
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
.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
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A147167 A146647 A146719 * A146274 A147037 A146796
KEYWORD
nonn
AUTHOR
STATUS
approved