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A146715
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-1000 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 17, 21, 589, 1201, 14115, 35729, 829417, 2513431, 171871447, 646550497, 84488290479, 394701151631, 87164416237779, 501702351302759, 183326230223443813, 1292311484391232601
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
.1.1.1.0.0.1.1.1
CROSSREFS
Sequence in context: A146699 A146707 A146643 * A146848 A146611 A146398
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved