A241051 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.

4, 2, 3, 6, 6, 15, 31, 58, 170, 388, 677, 1821, 3533, 7379, 18106, 37073, 82436, 193696, 400749, 914323, 2049019, 4372160, 9966006, 21985585, 47864157, 108257464, 237088178, 522824937, 1171545248, 2567836513, 5698120668, 12680572718

Offset: 1

Author

R. H. Hardin, Apr 15 2014

Keywords

• nonn

Comments

Column 3 of A241054

Examples

			All solutions for n=4
..3..3..2....3..3..2....3..3..2....3..3..2....3..3..2....3..3..2
..2..2..0....2..2..0....2..2..0....2..2..0....2..0..0....2..2..0
..3..3..0....3..3..0....2..0..0....3..3..0....2..0..0....3..3..0
..3..2..0....2..2..3....2..0..0....2..2..0....2..0..0....3..2..3
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..250