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A146278
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 17, 29, 45, 101, 297, 821, 2819, 10635, 50419, 205159, 928911, 4321051, 24702095, 144781137, 1031901327, 7307383577, 64959695293, 541722263927, 5441453632793
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.1.1.0.0.1.1.1.0
.1.1.1.0.1.1.0.0
.1.1.1.0.0.0.0.0
.0.0.0.0.0.1.1.1
.0.0.1.1.0.1.1.1
.0.1.1.1.0.0.1.1
.0.1.1.1.0.0.0.0
CROSSREFS
Sequence in context: A242025 A027703 A075695 * A034937 A024351 A246325
KEYWORD
nonn
AUTHOR
STATUS
approved