A185566 1/4 the number of nX8 0..3 arrays with no element equal both to the element above and to the element to its left.

16384, 683437500, 28355191537860, 1176277376648694960, 48796145962555619907720, 2024236566241727245692157080, 83972485690826213759616527499540, 3483475434832751291309593655505225600

Offset: 1

Author

R. H. Hardin Jan 31 2011

Keywords

• nonn

Comments

Column 8 of A185567

Examples

			Some solutions for 3X8 with a(1,1)=0
..0..0..0..0..0..0..1..3....0..0..0..0..0..0..1..1....0..0..0..0..0..2..2..1
..0..2..0..2..2..0..0..1....0..2..0..2..2..2..3..1....0..2..0..2..2..0..2..3
..0..0..2..0..0..2..0..3....0..0..2..0..0..2..2..1....0..0..2..0..2..0..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..158