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A146794
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0110-0100-1111 pattern in any orientation.
0
1, 1, 1, 1, 1, 5, 17, 41, 145, 657, 4553, 32425, 257569, 2670753, 36201945, 564616361, 10290347089, 235475912465, 6833463711081, 238928359316057, 9863518167137825
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.1.0.0
.0.0.0.1.0.0.0.0
.1.0.0.1.1.0.0.1
.1.1.1.0.0.1.0.1
.1.0.1.0.0.1.1.1
.1.0.0.1.1.0.0.1
.0.0.0.0.1.0.0.0
.0.0.1.1.1.1.0.0
CROSSREFS
Sequence in context: A139562 A201599 A246636 * A146834 A130739 A147412
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved