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Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with no element plus any vertical neighbor equal to n-1.
0

%I #5 Oct 02 2021 10:23:08

%S 1,6,1462,1584088,8616332520,71643177829872,1642669067898696816

%N Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with no element plus any vertical neighbor equal to n-1.

%C Column 4 of A265863.

%e Some solutions for n=3

%e ..2..2..2..0....2..1..0..0....0..2..1..0....1..2..0..2....2..0..0..2

%e ..1..1..1..0....1..2..0..0....0..1..2..0....0..1..1..2....1..1..1..1

%e ..0..0..2..1....2..2..1..1....1..2..2..1....0..0..2..1....2..0..0..2

%Y Cf. A265863.

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 17 2015