login
A146667
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-0110 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 17, 31, 603, 1115, 11773, 31193, 660175, 1987061, 224682951, 885526067, 157313783505, 768394153739, 158904168376893, 960773446522435, 410688920693142221, 3062625865459683273
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A045700 A146800 A146731 * A146462 A089171 A279370
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved