A241258 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or zero 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.

6, 39, 47, 120, 446, 1202, 3822, 11428, 35540, 119334, 350064, 1176852, 3642784, 10937680, 36354323, 110544260, 342643258, 1103393347, 3372356997, 10609585314, 33372515121, 103547161107, 325451014192, 1015953932945, 3176715059861

Offset: 1

Author

R. H. Hardin, Apr 18 2014

Keywords

• nonn

Comments

Row 4 of A241255

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..180