A240287 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

4, 38, 262, 3457, 28654, 443168, 3980245, 64782938, 596789376, 9869794598, 91652276224, 1523203607042, 14179800809674, 236017741338558, 2198821491143543, 36615754869208829, 341205510217305667

Offset: 1

Author

R. H. Hardin, Apr 03 2014

Keywords

• nonn

Comments

Row 4 of A240284

Examples

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

Links

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