A196336 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,3,1,2 for x=0,1,2,3,4.

17, 123, 744, 14973, 169152, 1783508, 20775275, 288083607, 3804352736, 45025949276, 551749790508, 6938656473356, 86871212883112, 1084929546742079, 13732256293307465, 172093176937103403, 2135921380879622460

Offset: 1

Author

R. H. Hardin Oct 01 2011

Keywords

• nonn

Comments

Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 1's, every 4 is next to 4 2's

Column 7 of A196337

Examples

			Some solutions for n=4
..1..0..1..1..3..1..0....0..1..3..1..1..0..0....0..0..0..0..0..0..0
..3..1..1..0..1..1..0....0..1..1..0..1..1..1....1..3..1..1..3..1..1
..1..3..1..0..1..1..0....0..1..1..0..3..1..3....3..1..3..3..1..1..3
..0..0..1..1..3..1..0....0..1..3..1..1..0..1....1..0..1..1..0..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..127