A241438 Number of 4Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the 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.

7, 3, 97, 515, 1563, 5915, 22712, 76145, 270960, 1073158, 3818620, 13721807, 51728838, 187790119, 699951598, 2604140270, 9348611449, 35299653581, 130303556135, 471759570058, 1773938926867, 6503523325619, 23881500761462

Offset: 1

Author

R. H. Hardin, Apr 22 2014

Keywords

• nonn

Comments

Row 4 of A241435

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..139