A240372 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

4, 21, 75, 450, 1729, 7233, 36148, 139855, 645733, 2919837, 11900426, 55182313, 238587617, 1020077489, 4627613220, 19831142375, 86874931360, 386104242606, 1664229710205, 7344843690603, 32253553194721, 140150173949016

Offset: 1

Author

R. H. Hardin, Apr 04 2014

Keywords

• nonn

Comments

Column 3 of A240376

Examples

			Some solutions for n=4
..3..2..3....3..2..3....3..2..3....3..2..3....2..2..2....3..3..2....3..3..2
..3..2..1....3..2..1....2..0..1....3..2..1....2..0..0....2..2..2....3..2..0
..2..0..2....2..2..3....3..1..2....2..0..2....3..1..0....3..1..3....2..0..0
..3..3..1....2..0..2....2..1..2....3..3..0....2..2..0....2..1..1....3..3..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210