A241358 Number of 3 X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or one 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.

4, 3, 19, 51, 61, 230, 641, 960, 3746, 9339, 16659, 60981, 137870, 288484, 962239, 2106198, 4825844, 14944563, 32681302, 79714689, 232184355, 513198469, 1304385350, 3611732771, 8129991862, 21132067461, 56282787035, 129448737499

Offset: 1

Author

R. H. Hardin, Apr 20 2014

Keywords

• nonn

Comments

Row 3 of A241356.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..194

Crossrefs

Cf. A241356.