A239997 Number of nX4 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 or one plus the sum of the elements diagonally to its northwest, modulo 4.

5, 42, 526, 6527, 86360, 1225281, 18392485, 290513038, 4767970186, 80410934960, 1381071762609, 24002339457710, 420292066661594, 7394152265405038, 130463578696387397, 2306049013760669647, 40806118077181581732

Offset: 1

Author

R. H. Hardin, Mar 30 2014

Keywords

• nonn

Comments

Column 4 of A240000

Examples

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

Links

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