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A147002
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation.
0
1, 1, 1, 1, 1, 5, 20, 47, 155, 569, 2601, 13423, 95231, 685877, 6411543, 61586198
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.1.1.0
.0.0.0.0.1.0.0.1
.1.0.0.0.1.0.0.1
.1.0.0.0.0.1.1.1
.1.1.1.0.0.0.0.1
.1.0.0.1.0.0.0.1
.1.0.0.1.0.0.0.0
.0.1.1.1.1.1.0.0
CROSSREFS
Sequence in context: A033429 A168011 A160749 * A005287 A147488 A297569
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved