A239825 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, modulo 4.

293, 78188, 28156167, 9807771898, 3347474694032, 1154988223050638, 399696014140196630, 138146553326582677362, 47759100046784529992245, 16518942523671833416785350, 5714008803899171208707626059

Offset: 1

Author

R. H. Hardin, Mar 27 2014

Keywords

• nonn

Comments

Row 7 of A239819

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210