A240188 Number of nX3 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or three plus the sum of the elements diagonally to its northwest, modulo 4.

1, 8, 37, 138, 680, 2413, 10017, 43956, 159668, 681760, 2806434, 10675575, 45462460, 181764269, 715963401, 3000804172, 11895218236, 47847647772, 197325296591, 783759057127, 3182984036915, 12972975259195, 51820141213238

Offset: 1

Author

R. H. Hardin, Apr 02 2014

Keywords

• nonn

Comments

Column 3 of A240192

Examples

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

Links

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