A241261 Number of 7 X n 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.

20, 488, 2111, 13328, 225191, 1558957, 13138271, 205823368, 1596727720, 16865140873

Offset: 1

Author

R. H. Hardin, Apr 18 2014

Keywords

• nonn

Comments

Row 7 of A241255.

Examples

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

Crossrefs

Cf. A241255.