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A147486
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11011-01110-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 5, 1, 12, 3, 33, 8, 104, 23, 411, 63, 1754, 191, 8637, 685, 51410, 3493
OFFSET
1,7
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.1.1.0.0
.0.1.0.1.1.1.0.1.0
.0.1.1.0.1.0.1.1.0
.0.0.1.1.0.1.1.0.0
.0.1.1.0.1.0.1.1.0
.0.1.0.1.1.1.0.1.0
.0.0.1.1.0.1.1.0.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A129982 A052552 A147000 * A168018 A173238 A173284
KEYWORD
nonn
AUTHOR
STATUS
approved