A196293 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,4,2 for x=0,1,2,3,4

1, 9, 58, 2161, 160800, 29726608, 14372583192, 17833080104711

Offset

1,2

Comments

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

Diagonal of A196300

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A271271 A055423 A322207 * A196211 A196679 A276450

Adjacent sequences: A196290 A196291 A196292 * A196294 A196295 A196296

Keyword

nonn

Author

R. H. Hardin Sep 30 2011

Status

approved