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A147485
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 2, 3, 5, 7, 13, 19, 54, 129, 405, 1014, 3416, 8953, 35203, 121647, 602370, 2444491, 14100721, 64488491, 418264276, 2289523483
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.0.1.1.0
.0.0.0.1.1.1.0.1
.1.0.0.0.1.0.1.1
.1.1.0.0.0.1.1.0
.0.1.1.0.0.0.1.1
.1.1.0.1.0.0.0.1
.1.0.1.1.1.0.0.0
.0.1.1.0.1.1.0.0
CROSSREFS
Sequence in context: A252398 A330383 A146999 * A341650 A341640 A104189
KEYWORD
nonn
AUTHOR
STATUS
approved