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Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.
0

%I #3 Nov 29 2015 06:03:12

%S 0,2,332,184740,196389904,368696849320,1122409297218768,

%T 5194172319787113488,34756519036284839519360

%N Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.

%C Column 4 of A264945.

%e Some solutions for n=4

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

%e ..1..2..3..2....1..2..0..3....1..3..0..2....1..2..3..0....1..3..1..0

%e ..0..1..3..2....3..1..2..3....3..1..3..2....1..2..3..0....3..0..2..1

%e ..3..1..3..0....2..0..3..1....1..3..2..0....3..1..3..2....3..2..3..2

%Y Cf. A264945.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 29 2015