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A146732
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1110-0111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 253, 253, 4269, 4269, 109305, 109305, 2719409, 2719409, 106590781, 106590781
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.0.1.1.1.0.1.1.1.0
.1.1.1.0.0.0.1.1.1
.0.0.0.0.0.0.0.0.0
.1.1.1.0.0.0.1.1.1
.0.1.1.1.0.1.1.1.0
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A147053 A146857 A146668 * A146588 A146628 A146636
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved