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A147082
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 10000-11111-10000 pattern in any orientation.
0
1, 1, 1, 1, 1, 9, 17, 37, 127, 477, 2126, 12479, 73108, 516995, 4269319, 43333873, 484061833
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.1.0.1.0.0.0.0
.0.1.0.1.1.1.1.1
.0.1.0.1.0.0.0.0
.0.1.0.0.0.1.1.1
.1.1.1.0.0.0.1.0
.0.0.0.0.1.0.1.0
.1.1.1.1.1.0.1.0
.0.0.0.0.1.0.1.0
CROSSREFS
Sequence in context: A097478 A147026 A055393 * A145941 A245542 A186298
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved