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 A267900 Number of nX4 arrays of permutations of 4 copies of 0..n-1 with every element equal to at least one horizontal or vertical neighbor and the top left element equal to 0. 0

%I

%S 1,11,268,17658,1696920,273460560,59383337040

%N Number of nX4 arrays of permutations of 4 copies of 0..n-1 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

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Last modified January 20 08:18 EST 2020. Contains 331081 sequences. (Running on oeis4.)