A197279 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,1,1 for x=0,1,2,3,4

25, 275, 2626, 57137, 886737, 13500114, 209785488, 3332948197, 55701159000, 888511016495, 14113426224907, 227682122103328, 3670040705518361, 58842498077190676, 948189035889733725, 15294961470395061151

Offset

1,1

Comments

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

Column 7 of A197280

Links

R. H. Hardin, Table of n, a(n) for n = 1..118

Example

Some solutions containing all values 0 to 4 for n=4
..1..1..1..0..1..1..0....1..0..0..0..0..1..1....1..3..1..0..0..1..2
..0..0..1..1..4..1..0....1..1..3..1..1..1..0....0..1..3..1..1..4..1
..1..1..3..1..1..3..1....0..1..1..3..1..4..1....0..1..3..1..4..1..0
..2..1..0..0..0..0..1....1..1..0..0..0..1..2....0..1..1..0..1..1..0

Crossrefs

Sequence in context: A012859 A010830 A022717 * A061617 A078463 A231790

Adjacent sequences: A197276 A197277 A197278 * A197280 A197281 A197282

Keyword

nonn

Author

R. H. Hardin Oct 12 2011

Status

approved