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A265655
Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal diagonal or antidiagonal neighbors and new values introduced sequentially from 0.
0
1, 2, 104, 39913, 35213302, 59232755329, 167960505022072
OFFSET
1,2
COMMENTS
Column 4 of A265656.
EXAMPLE
Some solutions for n=4
..0..1..2..3....0..1..2..0....0..1..2..0....0..1..0..1....0..1..0..2
..2..3..2..0....2..3..3..1....3..1..3..1....0..2..3..2....3..3..0..3
..1..1..2..0....1..0..0..1....2..2..0..0....3..2..3..2....1..1..1..2
..3..0..3..1....2..3..3..2....3..1..3..2....1..0..3..1....2..2..3..0
CROSSREFS
Cf. A265656.
Sequence in context: A101530 A199945 A346165 * A001184 A370963 A098653
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 12 2015
STATUS
approved