A239990 Number of 6Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

10, 84, 935, 9079, 83658, 652346, 4803152, 33097266, 216706121, 1349071998, 8021288399, 45621294425, 248975151409, 1305176292249, 6573063784889, 31800829162681, 147862529519971, 661287427073134, 2848137371338660

Offset: 1

Author

R. H. Hardin, Mar 30 2014

Keywords

• nonn

Comments

Row 6 of A239986

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 55

Formula

Empirical polynomial of degree 55 (see link above)