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A215844
Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the even squares of an nX3 array with new integer colors introduced in row major order
1
1, 1, 4, 8, 102, 364, 8460, 40612, 1440676, 8520924, 419195864, 2916070032, 187464151920, 1489852279864, 120167989574768, 1069484429786480, 105066789765860688, 1031932540617115200, 120715131903960979168
OFFSET
1,3
COMMENTS
Column 3 of A215847
LINKS
EXAMPLE
Some solutions for n=4
..0..x..1....0..x..1....0..x..1....0..x..1....0..x..1....0..x..1....0..x..1
..x..2..x....x..2..x....x..2..x....x..2..x....x..2..x....x..2..x....x..2..x
..3..x..0....3..x..4....1..x..3....3..x..4....3..x..0....3..x..4....1..x..0
..x..1..x....x..1..x....x..4..x....x..5..x....x..4..x....x..0..x....x..3..x
CROSSREFS
Sequence in context: A071277 A336795 A273060 * A111100 A105036 A012940
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 24 2012
STATUS
approved