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A147511
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 9, 15, 29, 57, 137, 413, 1389, 4485, 15371, 54209, 224739, 1032991, 5497929, 29140255, 171761393, 1058704295, 7315438183
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.1.1.1.1
.1.1.0.1.1.1.1.0
.1.1.0.0.0.0.0.0
.1.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.1
.0.0.0.0.0.0.1.1
.0.1.1.1.1.0.1.1
.1.1.1.1.0.0.0.1
CROSSREFS
Sequence in context: A046356 A248381 A060874 * A124580 A103508 A051246
KEYWORD
nonn
AUTHOR
STATUS
approved