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A146444
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation.
0
1, 1, 1, 1, 5, 17, 61, 319, 1657, 10301, 78887, 808895, 10915803, 187729525, 3870401483
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.1.0.0.0.0.0.1.0
.1.0.0.0.0.0.1.1
.1.1.1.0.0.1.0.0
.0.0.1.0.0.1.1.1
.1.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.1.1.0.0.0.0
CROSSREFS
Sequence in context: A273327 A273836 A273704 * A128073 A051736 A301560
KEYWORD
nonn
AUTHOR
STATUS
approved