A196474 Number of nX5 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.

8, 18, 17, 70, 151, 557, 2351, 6926, 16083, 43523, 126887, 366749, 1196290, 3904083, 12242778, 35866180, 101052064, 296050389, 899499517, 2807496039, 8933240984, 27433666911, 81672960692, 242780272113, 727008678986, 2224880992862

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 5 of A196477

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210