A196910 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,1,2,0,4 for x=0,1,2,3,4.

9, 199, 2843, 45491, 733802, 12186565, 200038888, 3288093050, 54146489903, 891524201851, 14679971940400, 241775144671286, 3982212408210114, 65590626468018714, 1080350655220465627, 17794687292056874401

Offset

1,1

Comments

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

Column 6 of A196912

Links

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

Example

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

Crossrefs

Sequence in context: A003026 A157594 A232276 * A064756 A197077 A093708

Adjacent sequences: A196907 A196908 A196909 * A196911 A196912 A196913

Keyword

nonn

Author

R. H. Hardin, Oct 07 2011

Status

approved