A196706 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,0,4,2 for x=0,1,2,3,4.

40, 6208, 353591, 26495227, 1883754015, 134682461126, 9630587515529, 688873132970642, 49276676966789269, 3524626082557601875, 252104533342881651241, 18032369299020473778391, 1289809476341608457763412

Offset: 1

Author

R. H. Hardin Oct 05 2011

Keywords

• nonn

Comments

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

Column 7 of A196707

Examples

			Some solutions for n=4
..0..0..0..0..0..1..1....0..0..0..2..0..2..0....0..0..0..0..1..0..1
..0..0..0..2..1..0..0....0..0..0..2..1..1..0....0..0..0..0..1..0..1
..0..0..0..2..1..2..2....0..0..0..0..0..0..1....0..0..0..0..2..2..0
..0..2..2..0..0..0..0....0..0..0..1..1..0..1....0..0..0..0..0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..75