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A147324
Number of n X n binary arrays symmetric under 180 degree rotation with all 1's connected only in a 00100-00100-00100-11111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 15, 54, 179, 629, 2109, 10035, 48099
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.1.1.1.1.1.0.0.1
.0.0.1.0.0.0.0.1
.0.0.1.0.1.1.1.1
.1.0.1.0.0.0.0.1
.1.0.0.0.0.1.0.1
.1.1.1.1.0.1.0.0
.1.0.0.0.0.1.0.0
.1.0.0.1.1.1.1.1
CROSSREFS
Sequence in context: A149582 A149583 A149584 * A109245 A243076 A002221
KEYWORD
nonn
AUTHOR
STATUS
approved