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A147426
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 10101-11111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 5, 15, 25, 53, 121, 291, 811, 2486
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.1.0.1.0.1.0.1.1
.1.1.1.1.1.0.1.0
.0.0.0.0.0.0.1.1
.1.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.1
.1.1.0.0.0.0.0.0
.0.1.0.1.1.1.1.1
.1.1.0.1.0.1.0.1
CROSSREFS
Sequence in context: A229312 A197072 A147495 * A100437 A339567 A067533
KEYWORD
nonn
AUTHOR
STATUS
approved