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A147420
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation.
0
1, 1, 1, 1, 1, 9, 23, 64, 295, 1072, 4637, 27060, 195073, 1617157, 15822995, 190207942, 2553434864, 40752029560
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.1.1.0.0.0.0.0
.1.1.1.1.0.1.1.0
.1.0.0.1.0.0.1.1
.0.1.1.0.0.0.1.1
.1.1.0.0.0.1.1.0
.1.1.0.0.1.0.0.1
.0.1.1.0.1.1.1.1
.0.0.0.0.0.1.1.0
CROSSREFS
Sequence in context: A183338 A212676 A211478 * A259170 A057453 A282761
KEYWORD
nonn
AUTHOR
STATUS
approved