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A147259
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0001-1101-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 13, 43, 61, 149, 365, 1499
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.0.1.1.1
.1.0.1.1.0.1.0.0
.1.1.1.0.0.1.1.0
.0.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.0
.0.1.1.0.0.1.1.1
.0.0.1.0.1.1.0.1
.1.1.1.0.0.0.0.1
CROSSREFS
Sequence in context: A298234 A129789 A093576 * A328740 A183315 A183184
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved