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A146443
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 17, 41, 75, 189, 781, 2423, 8297, 41313, 246219, 1447691, 8722011, 58593249, 472152107, 3875447631
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.0.0.1.1
.1.1.1.0.0.0.1.0
.0.0.1.0.1.1.1.0
.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0
.0.1.1.1.0.1.0.0
.0.1.0.0.0.1.1.1
.1.1.0.0.0.0.0.1
CROSSREFS
Sequence in context: A267421 A166147 A028886 * A110226 A054819 A235743
KEYWORD
nonn
AUTHOR
STATUS
approved