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A147222
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0101 pattern in any orientation.
0
1, 1, 1, 1, 1, 21, 45, 251, 1189, 5949, 38111, 398367, 3732199
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.0.1.0
.1.1.0.0.1.1.1.0
.0.1.0.0.0.0.1.1
.1.1.1.0.0.1.0.0
.0.0.1.0.0.1.1.1
.1.1.0.0.0.0.1.0
.0.1.1.1.0.0.1.1
.0.1.0.1.0.0.0.0
CROSSREFS
Sequence in context: A063500 A372290 A102603 * A199767 A044098 A044479
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved