A240409 Number of nX4 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

6, 80, 846, 11670, 148536, 2051450, 27295809, 377924479, 5090700587, 70407569019, 954551839061, 13174232753505, 179288052424091, 2469879998025684, 33692295233425277, 463482286724987999, 6332258123206034509

Offset: 1

Author

R. H. Hardin, Apr 04 2014

Keywords

• nonn

Comments

Column 4 of A240412

Examples

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

Links

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