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A147207
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0101-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 13, 37, 65, 115, 397, 1335, 4065, 16853, 83455, 458373, 2464107, 13365801, 84069939, 594053347
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.0.0.0.1.1.0.0.0
.0.1.0.1.0.1.1.0
.0.1.1.1.0.1.0.0
.1.0.0.0.0.1.1.1
.1.1.1.0.0.0.0.1
.0.0.1.0.1.1.1.0
.0.1.1.0.1.0.1.0
.0.0.0.1.1.0.0.0
CROSSREFS
Sequence in context: A138368 A118071 A307192 * A146877 A309720 A233435
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved