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A147358
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-0110-1111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 8, 19, 34, 51, 134, 355, 989, 3419, 12452
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.1.1.1.1.0
.1.0.0.0.1.1.0.0
.1.1.1.0.1.1.0.0
.1.1.1.0.0.0.0.1
.1.0.0.0.0.1.1.1
.0.0.1.1.0.1.1.1
.0.0.1.1.0.0.0.1
.0.1.1.1.1.0.0.0
CROSSREFS
Sequence in context: A113535 A184444 A139020 * A209367 A086167 A083186
KEYWORD
nonn
AUTHOR
STATUS
approved