A196435 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 for x=0,1,2,3,4.

13, 178, 1801, 21803, 246463, 2856711, 32855368, 378154308, 4356726770, 50163397373, 577634629068, 6651858481248, 76599144629883, 882067405853789, 10157379663581632, 116966622243380304, 1346919921065307751

Offset: 1

Author

R. H. Hardin Oct 02 2011

Keywords

• nonn

Comments

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

Column 7 of A196436

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200