%I
%S 1,11,268,17658,1696920,273460560,59383337040
%N Number of nX4 arrays of permutations of 4 copies of 0..n1 with every element equal to at least one horizontal or vertical neighbor and the top left element equal to 0.
%C Column 4 of A267901.
%e Some solutions for n=4
%e ..0..0..1..3....0..3..2..2....0..0..1..1....0..2..2..1....0..0..1..1
%e ..2..2..1..3....0..3..0..0....2..2..3..0....0..1..1..1....0..0..3..3
%e ..1..0..2..2....2..1..1..3....1..2..3..0....3..2..3..3....2..3..2..2
%e ..1..0..3..3....2..1..1..3....1..2..3..3....3..2..0..0....2..3..1..1
%Y Cf. A267901.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 22 2016
