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A147399
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 45, 45, 217, 217, 1729, 1729, 28581, 28581, 422837, 422837, 7769557, 7769557, 212491441, 212491441
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.0.1.1.1.0.1.1.1.0
.1.1.1.0.0.0.1.1.1
.1.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.1.1.1.0.0.0.1.1.1
.0.1.1.1.0.1.1.1.0
.0.0.0.1.0.1.0.0.0
CROSSREFS
Sequence in context: A146780 A146860 A146185 * A147195 A147045 A146065
KEYWORD
nonn
AUTHOR
STATUS
approved