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A147163
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1101-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 17, 21, 565, 1121, 12671, 31849, 581567
OFFSET
1,7
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
.0.0.0.0.0.0.0.0
.0.1.1.0.0.1.1.0
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
.1.1.0.0.0.0.1.1
CROSSREFS
Sequence in context: A146840 A146587 A147256 * A147179 A146627 A146635
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved