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A147503
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-0110-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 7, 19, 33, 55, 139, 371, 947, 2907, 11335
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.0.1.1.1
.1.1.1.0.0.1.1.0
.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0
.0.1.1.1.0.1.1.1
.0.1.1.0.0.1.1.1
.1.1.1.0.0.0.0.1
CROSSREFS
Sequence in context: A153892 A338410 A038869 * A147465 A053591 A165333
KEYWORD
nonn
AUTHOR
STATUS
approved