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A147220
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0111-0101 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 43, 115
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.1.0.1.0.0
.0.0.0.0.1.1.1.0.0
.0.0.0.1.1.0.0.1.1
.0.0.1.0.0.0.0.1.0
.1.1.1.0.0.0.1.1.1
.0.1.0.0.0.0.1.0.0
.1.1.0.0.1.1.0.0.0
.0.0.1.1.1.0.0.0.0
.0.0.1.0.1.0.0.0.0
CROSSREFS
Sequence in context: A301685 A102724 A147031 * A269713 A196069 A147182
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved