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A146601
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111 pattern in any orientation.
0
1, 1, 1, 1, 9, 17, 69, 301, 1753, 10173, 84391, 728377, 10351543, 132350331, 2998203817
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.1
.1.0.0.0.1.1.1.1
.1.1.1.1.0.0.0.0
.0.0.0.0.1.1.1.1
.1.1.1.1.0.0.0.1
.1.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A282764 A319018 A101304 * A121955 A151793 A118852
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved