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A146710
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 33, 61, 193, 825, 3483, 14075, 51829, 241741, 1419559, 10170199, 74039549, 568610375, 4513545321
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.0.0
.0.0.1.1.1.1.0.0
.0.1.0.0.1.0.1.1
.0.1.0.0.0.1.1.1
.1.1.1.0.0.0.1.0
.1.1.0.1.0.0.1.0
.0.0.1.1.1.1.0.0
.0.0.1.1.0.0.0.0
CROSSREFS
Sequence in context: A147135 A146843 A146630 * A146803 A146702 A146734
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved