A196476 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,0,3,2,1 for x=0,1,2,3,4.

17, 43, 42, 305, 2351, 38826, 299659, 1231691, 5238322, 26129353, 141788701, 1086218484, 7344638998, 38637965991, 209973350431, 1159411392373, 6436583617125, 39481503993996, 240320932969724, 1381481638118489

Offset: 1

Author

R. H. Hardin Oct 03 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 2's, every 4 is next to 4 1's

Column 7 of A196477

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..103