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A215740
Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the odd squares of an nX3 array with new integer colors introduced in row major order
1
1, 1, 1, 8, 22, 364, 1474, 40612, 211784, 8520924, 53617792, 2916070032, 21317896720, 1489852279864, 12342388117560, 1069484429786480, 9864419605055184, 1031932540617115200, 10458239434388496304
OFFSET
1,4
COMMENTS
Column 3 of A215745
LINKS
EXAMPLE
Some solutions for n=4
..x..0..x....x..0..x....x..0..x....x..0..x....x..0..x....x..0..x....x..0..x
..1..x..2....1..x..2....1..x..2....1..x..2....1..x..2....1..x..2....1..x..2
..x..3..x....x..3..x....x..3..x....x..3..x....x..3..x....x..3..x....x..3..x
..2..x..0....2..x..1....4..x..0....4..x..5....4..x..1....0..x..1....0..x..4
CROSSREFS
Sequence in context: A183308 A362825 A117613 * A304177 A306834 A109271
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 22 2012
STATUS
approved