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A147125
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1000-1111-1000 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 105, 105, 641, 641, 8787, 8787, 211111, 211111, 4653287
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.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
.1.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.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
CROSSREFS
Sequence in context: A146258 A146173 A146190 * A147109 A147117 A147263
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved