A240043 Number of nX4 0..3 arrays with no element equal to zero 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.

6, 20, 72, 346, 1496, 8567, 46381, 268672, 1556758, 9438166, 56174788, 346760638, 2098659043, 13032771483, 79558734990, 494814764391, 3034462087200, 18868201942704, 116012171614159, 720835003158134, 4439604572498702

Offset: 1

Author

R. H. Hardin, Mar 31 2014

Keywords

• nonn

Comments

Column 4 of A240046

Examples

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

Links

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