A241359 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

7, 4, 55, 128, 228, 1721, 5663, 11909, 69946, 220363, 570699, 2878602, 8802473, 26886516, 121529632, 369658890, 1215513262, 5099671734, 15392472866, 53972192998, 212784319669, 651213834921, 2381746719520, 8889638737979

Offset: 1

Author

R. H. Hardin, Apr 20 2014

Keywords

• nonn

Comments

Row 4 of A241356

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..157