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A146708
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 329, 329, 4511, 4511, 91215, 91215, 2775809, 2775809, 118081991, 118081991
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.1.1.0.1.1.0.0
.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.1.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146636 A146833 A146700 * A146463 A146841 A147180
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved