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A147442
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-1010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 5, 22, 29, 66, 111, 398, 821, 3860, 9205
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.1.0.1.0
.1.1.1.0.1.1.1.1
.0.1.0.0.1.0.1.0
.1.1.1.0.0.0.0.0
.0.0.0.0.0.1.1.1
.0.1.0.1.0.0.1.0
.1.1.1.1.0.1.1.1
.0.1.0.1.0.0.1.0
CROSSREFS
Sequence in context: A186751 A280037 A292557 * A370580 A025093 A025112
KEYWORD
nonn
AUTHOR
STATUS
approved