A197315 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4

4, 6, 79, 790, 4780, 24704, 189212, 1400102, 8813744, 62844698, 436492213, 3010736948, 20777197101, 144191070226, 998239321771, 6903357295660, 47811537748912, 330940337259970, 2291691748249353, 15860451380186238

Offset

1,1

Comments

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

Column 6 of A197317

Links

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

Example

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

Crossrefs

Sequence in context: A319264 A013128 A012971 * A061216 A058163 A375660

Adjacent sequences: A197312 A197313 A197314 * A197316 A197317 A197318

Keyword

nonn

Author

R. H. Hardin Oct 13 2011

Status

approved