A269508 - OEIS

%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