login
A146195
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 101-111-100 pattern in any orientation.
0
1, 1, 1, 1, 5, 37, 165, 1001, 4705, 34363, 367959, 6088505, 78978585, 2279840895, 57010330201, 2094575171305, 78104783670439
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.0.1
.0.0.0.0.0.1.1.1
.0.0.1.1.0.0.0.1
.0.0.1.0.1.1.1.0
.0.1.1.1.0.1.0.0
.1.0.0.0.1.1.0.0
.1.1.1.0.0.0.0.0
.1.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A006468 A144954 A305861 * A358407 A273213 A273275
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2008
STATUS
approved