A229405 Number of n X n 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

4, 163, 53538, 142475606, 3113479414050, 555943964324988272, 812793729526357032659346, 9723835061406716550009482645332, 952115739439339063251356375563511227580

Offset: 1

Author

R. H. Hardin Sep 22 2013

Keywords

• nonn

Comments

Diagonal of A229412

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..10