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A147048
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 5, 5, 13, 13, 29, 29, 101, 101, 469, 469, 2569, 2569, 14457, 14457, 96029, 96029, 884501, 884501, 9747473
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.1.1.1.0.0.0.1.1.1
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.1.1.1.0.0.0.1.1.1
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A335357 A325679 A147198 * A110192 A014414 A087745
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved