A269648 Number of 4Xn arrays containing n copies of 0..4-1 avoiding the pattern down-up in every row and equal-up in every column.

24, 1880, 68876, 2316638, 94747953, 4581555620, 234861499280, 12266888439720, 650084333233220

Offset: 1

Author

R. H. Hardin, Mar 02 2016

Keywords

• nonn

Comments

Row 4 of A269646.

Examples

			Some solutions for n=3
..0..1..1. .3..2..1. .3..3..2. .0..1..2. .0..1..2. .2..2..0. .3..2..1
..2..2..3. .0..0..0. .2..2..1. .2..3..3. .3..0..0. .2..3..3. .0..1..3
..0..0..3. .3..3..2. .3..0..0. .1..0..0. .2..1..1. .1..1..1. .3..2..2
..1..2..3. .2..1..1. .1..1..0. .1..2..3. .2..3..3. .0..0..3. .1..0..0
		

Crossrefs

Cf. A269646.