A196956 Number of n X 7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,3,4,0 for x=0,1,2,3,4.

13, 178, 2987, 78717, 1918608, 46887039, 1147966466, 28133304588, 688970472958, 16871844816740, 413232005901840, 10120704139954048, 247866954036866195, 6070590513451031047, 148677076483267579402, 3641296772946640910171

Offset: 1

Author

R. H. Hardin, Oct 08 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 3's, every 3 is next to 3 4's, every 4 is next to 4 0's.

Column 7 of A196957.

Examples

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

Links

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

Crossrefs

Cf. A196957.