A240463 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

28, 476, 8187, 143237, 2501883, 43654661, 761700369, 13290291978, 231879123545, 4045526615228, 70580191049583, 1231367510496942, 21482798448261309, 374794402280678279, 6538751854554181415, 114076545131533814184

Offset: 1

Author

R. H. Hardin, Apr 05 2014

Keywords

• nonn

Comments

Row 4 of A240460

Examples

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

Links

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