

A196331


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


0




OFFSET

1,2


COMMENTS

Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 3's, every 3 is next to 3 1's, every 4 is next to 4 2's
Diagonal of A196337


LINKS

Table of n, a(n) for n=1..9.


EXAMPLE

Some solutions for n=4
..0..1..1..0....1..1..0..1....1..0..0..1....0..0..0..0....0..1..1..0
..0..3..1..0....0..3..1..3....1..0..0..1....1..1..3..1....0..1..3..0
..0..1..1..0....0..1..1..1....1..1..1..1....1..1..1..3....0..1..1..0
..1..3..1..0....1..1..0..0....0..1..1..0....0..0..0..1....1..3..1..0


CROSSREFS

Sequence in context: A187022 A196309 A196281 * A344361 A159019 A059394
Adjacent sequences: A196328 A196329 A196330 * A196332 A196333 A196334


KEYWORD

nonn


AUTHOR

R. H. Hardin Oct 01 2011


STATUS

approved



