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⇱ A147204 - OEIS

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A147204
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-0101-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 5, 17, 37, 97, 589, 4299, 27851, 193127, 2080835, 29286959, 452848509, 7844143081, 177658806371, 5163186936815, 177926288939305
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.0.0.0.0.1.0.1.0
.0.0.0.1.1.0.0.0
.0.0.1.0.0.0.0.0
.1.1.1.0.0.0.0.0
.1.0.0.0.0.0.0.0
.1.1.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146874 A145012 A360204 * A168024 A121326 A347300
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved