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A147453
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.
0
1, 1, 1, 1, 3, 1, 15, 9, 105, 33, 2514, 927, 80722, 22331, 4773446, 785549, 420563686, 56689127, 72421134415, 8452376637, 24510814953678, 2212845668155
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A039815 A318392 A329059 * A147020 A134685 A130757
KEYWORD
nonn
AUTHOR
STATUS
approved