%I #5 Aug 12 2016 06:54:17
%S 8,600,18332,480440,13522204,492613956,18677195738,753228526960,
%T 29963202454514,1236592684106800
%N Number of 4Xn arrays containing n copies of 0..4-1 avoiding the pattern down-up in every row and column.
%C Row 4 of A269505.
%e Some solutions for n=3
%e ..3..0..0. .2..1..0. .2..2..0. .0..1..0. .0..2..0. .3..2..1. .0..2..1
%e ..1..2..0. .2..2..0. .3..3..1. .1..3..0. .3..2..2. .0..3..2. .2..3..3
%e ..1..2..1. .1..3..0. .0..3..2. .2..3..1. .1..3..1. .0..1..3. .2..3..1
%e ..3..3..2. .1..3..3. .0..1..1. .3..2..2. .1..3..0. .2..1..0. .0..0..1
%Y Cf. A269505.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 28 2016