A240006 Number of 7Xn 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4.

368, 22592, 685898, 18392485, 429788876, 9314138750, 182333502325, 3306340714115, 55641031584148, 875242526758630

Offset: 1

Author

R. H. Hardin, Mar 30 2014

Keywords

• nonn

Comments

Row 7 of A240000

Examples

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