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A147282
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
0
1, 1, 1, 1, 1, 9, 29, 121, 541, 3221, 21119, 159497, 1485397, 18836335, 303422599, 5770504647
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.0.0.0
.1.1.0.0.1.1.1.0
.0.1.1.0.0.0.1.1
.0.0.1.0.1.1.0.1
.1.0.1.1.0.1.0.0
.1.1.0.0.0.1.1.0
.0.1.1.1.0.0.1.1
.0.0.0.1.0.0.0.0
CROSSREFS
Sequence in context: A183245 A101141 A056258 * A146602 A146413 A146054
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved