A239822 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, modulo 4.

25, 582, 17552, 510748, 14544801, 418324402, 12059066460, 347095468871, 9991360194005, 287711413471266, 8284928413145004, 238566125657445992, 6869701227384114007, 197820645386511819554, 5696463550662058123697

Offset: 1

Author

R. H. Hardin, Mar 27 2014

Keywords

• nonn

Comments

Row 4 of A239819

Examples

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

Links

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