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A146234
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-111-001 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 113, 113, 1393, 1393, 59521, 59521, 1585365, 1585365, 62771429, 62771429, 6390256297, 6390256297, 1169289395909, 1169289395909
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.1.0.0.0.0.1.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
CROSSREFS
Sequence in context: A147109 A147117 A147263 * A146182 A147149 A147277
KEYWORD
nonn
AUTHOR
STATUS
approved