A239400 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of elements above it, modulo 4.

8, 105, 1337, 16449, 205969, 2590704, 32507376, 408000104, 5124790809, 64375497505, 808627026775, 10157673828398, 127600254367522, 1602912146570029, 20135780318743491, 252946235316308314

Offset: 1

Author

R. H. Hardin, Mar 17 2014

Keywords

• nonn

Comments

Column 3 of A239405

Examples

			Some solutions for n=5
..3..1..0....0..0..3....0..0..0....0..0..0....0..3..1....0..0..3....0..3..3
..3..2..0....0..0..0....0..3..1....3..3..0....3..2..1....3..1..2....3..2..3
..3..2..3....3..3..2....0..0..0....2..0..0....2..2..3....2..2..2....2..0..1
..2..2..0....2..2..0....0..3..2....0..0..3....2..2..2....2..2..3....2..2..0
..3..3..2....0..2..0....3..3..0....2..0..0....0..0..0....0..0..2....0..2..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 64

Formula

Empirical recurrence of order 64 (see link above)