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A146248
Number of n X n binary arrays with all ones connected only in a 110-111-011 pattern in any orientation.
0
1, 1, 3, 9, 21, 85, 755, 7735, 87315, 1464567, 39342833, 1394115639, 64760833633, 4237428548705, 396489545524701, 50966003405928397, 8978681383047868049, 2201121987520740127861
OFFSET
1,3
EXAMPLE
Maximal 8 X 8 example
.0.1.1.0.0.1.1.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.0.0.0.1.1.0.0
.0.0.0.1.1.1.0.0
.1.1.0.1.1.0.1.1
.1.1.1.0.0.1.1.1
.0.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A053499 A218003 A146909 * A074000 A067645 A101474
KEYWORD
nonn
AUTHOR
STATUS
approved