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⇱ A147219 - OEIS

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A147219
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-0111-0101 pattern in any orientation.
0
1, 1, 1, 1, 1, 5, 17, 37, 107, 651, 4763, 31885, 243507, 2726593, 39573223, 647861719, 12294997893, 299566536047, 9265546813073, 344823799726629
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
.0.0.0.0.1.0.1.0
.0.0.0.0.1.1.1.0
.0.0.1.1.0.0.1.1
.0.0.0.1.0.0.0.0
.0.0.1.1.1.0.0.0
.0.0.0.0.1.0.0.0
CROSSREFS
Sequence in context: A121326 A347300 A212876 * A146280 A282511 A147181
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved