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A146585
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 5, 21, 83, 423, 2315, 16901, 170185, 2128101, 35334761, 707503833, 18370140687, 587431855321
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.1.1.1.0.0.0.0
.1.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.0.1.0.1.1.1.0
.0.1.1.1.0.1.0.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.1
.0.0.0.0.1.1.1.0
CROSSREFS
Sequence in context: A132310 A083319 A146041 * A351363 A215008 A026027
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved