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A147037
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 39, 39, 181, 181, 1975
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
.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
.0.0.1.0.0.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A146719 A147469 A146274 * A146796 A146836 A146780
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved