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A147435
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation.
0
1, 1, 1, 1, 1, 13, 21, 57, 259, 1017, 4255, 25913, 160493, 1488777, 11698881, 154711435, 1737788683, 30091739925
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.1.0.1.0.0.0.1.1
.1.1.1.1.0.1.1.0
.0.1.0.1.0.0.1.1
.0.0.0.0.0.1.1.0
.0.1.1.0.0.0.0.0
.1.1.0.0.1.0.1.0
.0.1.1.0.1.1.1.1
.1.1.0.0.0.1.0.1
CROSSREFS
Sequence in context: A275243 A066630 A368084 * A269309 A203854 A325448
KEYWORD
nonn
AUTHOR
STATUS
approved