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A147014
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-00010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 13, 31, 111, 377, 1545, 10231, 72633, 559663, 5155711, 55582209, 698619471, 11001973207, 206072905483, 4521907343165, 116328599746355, 3545239477906611, 127491366766265465
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.0.0
.0.0.0.0.1.1.0.0
.0.0.0.0.0.1.0.0
.0.0.0.0.0.1.1.0
.0.1.0.0.0.1.0.0
.1.1.1.1.1.0.0.0
.0.0.0.1.0.0.0.0
.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A121129 A051402 A147022 * A146376 A146368 A147424
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved