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A146596
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1000-1111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 77, 77, 549, 549, 6061, 6061, 126381, 126381, 3867721, 3867721, 164716773, 164716773
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.0.0.0.0.0.0.0.0.0
.1.1.1.1.0.1.1.1.1
.1.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146817 A146660 A070852 * A146391 A145945 A165838
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved