A196217 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,2,4 for x=0,1,2,3,4.

25, 1629, 21969, 723029, 21716929, 608417005, 17831030743, 525537881675, 15318916228421, 446553011295591, 13076767423341648, 382744483425525635, 11192520655926210678, 327413888234566814665, 9579556864719697800663

Offset: 1

Author

R. H. Hardin Sep 29 2011

Keywords

• nonn

Comments

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

Column 7 of A196218

Examples

			Some solutions for n=4
..0..1..2..1..0..0..0....0..2..1..0..1..2..1....0..0..1..1..1..0..1
..0..1..2..2..1..1..1....0..1..2..0..1..2..0....0..0..2..0..2..1..2
..2..1..1..0..1..1..1....0..2..3..1..1..1..1....1..2..1..0..2..1..2
..1..0..1..1..2..0..0....0..1..2..1..0..0..1....1..0..1..1..1..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..45