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A146694
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 37, 103, 317, 831, 2581, 12105, 62053, 307133, 1586103, 9856867, 66841097, 477861431
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.0.1.1.1.0.0.0.0
.1.0.0.1.1.0.0.0
.1.0.0.1.1.0.0.0
.1.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.1
.0.0.0.1.1.0.0.1
.0.0.0.1.1.0.0.1
.0.0.0.0.1.1.1.0
CROSSREFS
Sequence in context: A293058 A294367 A339495 * A146050 A147500 A300445
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved