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A147278
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
0
1, 1, 1, 1, 1, 5, 13, 29, 79, 475, 3011, 19375, 140949, 1504567, 19831039, 315319119, 5871550053, 136334165017, 3923421131189, 139268183686163
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.1.1
.0.0.0.0.0.0.1.0
.0.0.0.0.0.1.1.0
.0.0.0.0.1.1.0.0
.0.0.0.1.0.0.0.0
.0.0.1.1.0.0.0.0
.1.1.1.0.0.0.0.0
.1.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A239367 A124698 A337761 * A268963 A147349 A147288
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved