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A146582
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 5, 15, 25, 79, 181, 847, 2349, 14983, 51353, 387131, 1677003, 16440369, 89397803, 1133198975, 7724492549, 124149724539, 1068903623477
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.0.0.0.1.1.0.0.1
.0.0.0.0.1.0.0.1
.0.1.0.0.0.1.1.1
.1.1.1.0.0.0.1.0
.1.0.0.1.0.0.0.0
.1.0.0.1.1.0.0.0
.0.1.1.1.0.0.0.0
CROSSREFS
Sequence in context: A163114 A111386 A056487 * A349967 A321985 A301524
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved