A239336 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of elements above it, modulo 4.

28, 926, 27341, 790681, 22952323, 663249556, 19117551262, 550960518608, 15873533676775, 457181997376959, 13166310184133045, 379162593435951456, 10918763117793096685, 314422821700641922733, 9054241291311457562833

Offset: 1

Author

R. H. Hardin, Mar 16 2014

Keywords

• nonn

Comments

Column 4 of A239340

Examples

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

Links

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