login
A147157
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 3, 11, 27, 63, 325, 2169, 14949, 107269
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.1.0
.0.0.0.0.1.1.1.0
.0.0.0.1.0.0.1.1
.0.0.0.1.0.0.0.1
.0.0.1.1.1.0.0.0
.0.0.0.0.1.1.0.0
CROSSREFS
Sequence in context: A147110 A372612 A147118 * A146826 A059400 A250223
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved