

A196849


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


0




OFFSET

1,2


COMMENTS

Every 0 is next to 0 3's, every 1 is next to 1 1's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 4's
Diagonal of A196856


LINKS

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


EXAMPLE

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


CROSSREFS

Sequence in context: A091814 A280957 A020518 * A196699 A131216 A034909
Adjacent sequences: A196846 A196847 A196848 * A196850 A196851 A196852


KEYWORD

nonn


AUTHOR

R. H. Hardin Oct 06 2011


STATUS

approved



