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A220582
Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 4Xn array
0
1, 128, 375, 17505, 165130, 2652007, 33180533, 450926562, 5905274893, 77665021467
OFFSET
1,2
COMMENTS
Row 4 of A220579
EXAMPLE
Some solutions for n=3
..1..0..1....1..1..0....1..0..1....1..0..1....1..0..1....1..1..0....1..1..1
..1..0..0....0..0..1....1..0..0....1..1..1....1..1..1....0..0..1....1..0..0
..0..1..1....1..1..0....0..0..0....1..0..1....1..1..0....1..1..1....0..0..1
..1..1..0....0..1..0....0..0..1....1..1..1....0..1..1....1..0..1....1..0..1
CROSSREFS
Sequence in context: A234877 A229360 A086059 * A203449 A195090 A209380
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 16 2012
STATUS
approved