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A146691
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 19, 31, 599, 1163, 13781, 34743, 686711, 2032193, 168115995, 630196685, 103169062863, 486468362253, 96427000262963, 558209750316079, 186248241738031493
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.1.1.0.0.1.1.0
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
CROSSREFS
Sequence in context: A125602 A139847 A087764 * A146784 A147240 A147210
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved