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A147389
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 10001-11111-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 1, 13, 3, 36, 9, 103, 20, 390, 57, 1676, 190, 7624, 629
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.1.1.1.0.0
.1.1.0.0.1.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.1.0.0.0.1.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.1.0.0.1.1
.0.0.1.1.1.1.1.0.0
.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A130892 A353318 A239871 * A147008 A147365 A147064
KEYWORD
nonn
AUTHOR
STATUS
approved