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A147427
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 10101-11111 pattern in any orientation.
0
1, 1, 1, 1, 5, 13, 25, 49, 161, 793, 4845, 27471, 158415, 1126745, 9283892
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.1.1.0.1.1.1.1.1
.1.0.0.1.0.1.0.1
.1.1.0.0.0.0.0.0
.1.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.1
.0.0.0.0.0.0.1.1
.1.0.1.0.1.0.0.1
.1.1.1.1.1.0.1.1
CROSSREFS
Sequence in context: A147265 A272705 A147272 * A147408 A241657 A249513
KEYWORD
nonn
AUTHOR
STATUS
approved