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A147391
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 10001-11111-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 9, 13, 37, 78, 329, 1384, 8131, 38082, 266677, 1697877
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.1.1.0.0.1.0.0
.0.1.0.1.1.1.1.1
.1.1.0.1.0.0.0.1
.0.1.0.0.0.1.1.0
.0.1.1.0.0.0.1.0
.1.0.0.0.1.0.1.1
.1.1.1.1.1.0.1.0
.0.0.1.0.0.1.1.0
CROSSREFS
Sequence in context: A146723 A146422 A147352 * A241677 A146225 A219257
KEYWORD
nonn
AUTHOR
STATUS
approved