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A147221
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-0101 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 15, 37, 69, 139, 485, 1489
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.0.0.0.0
.0.0.1.0.1.1.0.0
.0.1.1.1.0.1.1.1
.0.1.0.0.0.1.0.1
.1.0.1.0.0.0.1.0
.1.1.1.0.1.1.1.0
.0.0.1.1.0.1.0.0
.0.0.0.0.1.1.0.0
CROSSREFS
Sequence in context: A181362 A082112 A059605 * A051461 A321383 A039605
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved