A197198 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,1,3,2,0 for x=0,1,2,3,4.

13, 178, 1801, 21803, 247053, 2873141, 33176391, 383262156, 4432780869, 51234398070, 592247668688, 6846309893866, 79142347014020, 914861421385891, 10575600998801299, 122251698517890245, 1413202926345456663

Offset: 1

Author

R. H. Hardin Oct 11 2011

Keywords

• nonn

Comments

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

Column 7 of A197199

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..107