A240197 Number of 7Xn 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 three plus the sum of the elements diagonally to its northwest, modulo 4.

15, 358, 10017, 333607, 14022582, 733907809, 43398047802, 2752449791995, 182092505409165, 12353055792220215, 850428778272052568, 59048111282882480477, 4120092662704003963630

Offset: 1

Author

R. H. Hardin, Apr 02 2014

Keywords

• nonn

Comments

Row 7 of A240192

Examples

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