A196136 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,3,4 for x=0,1,2,3,4.

1, 19, 70, 251, 1350, 3716, 20706, 63545, 255501, 992477, 3693353, 15143098, 54682695, 222402469, 838015799, 3238327921, 12552211666, 47967154876, 187109798637, 714494895572, 2773237529931, 10674786749417, 41144890359713

Offset: 1

Author

R. H. Hardin Sep 28 2011

Keywords

• nonn

Comments

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

Column 6 of A196138

Examples

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

Links

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