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A147334
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 9, 19, 45, 171, 735, 3657, 20047, 135531
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.1.0
.0.0.0.0.0.0.1.1
.0.0.0.0.0.1.1.0
.0.0.0.0.1.1.0.0
.0.0.0.1.0.1.0.0
.0.0.1.1.1.0.0.0
.1.1.1.0.0.0.0.0
.0.1.0.0.0.0.0.0
CROSSREFS
Sequence in context: A147431 A329145 A348377 * A147463 A095828 A028377
KEYWORD
nonn
AUTHOR
STATUS
approved