login
A147008
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 00100-11111-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 1, 13, 3, 37, 7, 103, 14, 365
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.1.0.0.0.0
.0.0.1.1.1.1.1.0.0
.0.1.0.0.1.0.0.1.0
.0.1.0.0.0.0.0.1.0
.1.1.1.0.0.0.1.1.1
.0.1.0.0.0.0.0.1.0
.0.1.0.0.1.0.0.1.0
.0.0.1.1.1.1.1.0.0
.0.0.0.0.1.0.0.0.0
CROSSREFS
Sequence in context: A353318 A239871 A147389 * A147365 A147064 A147228
KEYWORD
nonn
AUTHOR
_R. H. Hardin_, Nov 04 2008
STATUS
approved