A241437 Number of 3 X n 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.

4, 2, 22, 74, 158, 448, 1272, 3284, 8331, 23365, 63819, 159963, 450553, 1178189, 3085252, 8574583, 21981254, 59397292, 161093107, 416692229, 1133829778, 3023012096, 7951525097, 21508340343, 56988406704, 151552827477, 406957891025

Offset: 1

Author

R. H. Hardin, Apr 22 2014

Keywords

• nonn

Comments

Row 3 of A241435.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..170

Crossrefs

Cf. A241435.