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A147053
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1101-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 237, 237, 3143, 3143, 61525, 61525, 1581763, 1581763, 52804881, 52804881
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.1.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.0.0.1
.1.1.1.0.0.0.1.1.1
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.1.1.1.0.0.0.1.1.1
.1.0.0.0.0.0.0.0.1
.1.1.0.0.0.0.0.1.1
CROSSREFS
Sequence in context: A146801 A147203 A146777 * A146857 A146668 A146732
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved