

A197402


Number of nXn 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,1,1,1 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 0's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
Diagonal of A197409


LINKS

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


EXAMPLE

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


CROSSREFS

Sequence in context: A153820 A009139 A086018 * A213133 A159037 A138589
Adjacent sequences: A197399 A197400 A197401 * A197403 A197404 A197405


KEYWORD

nonn


AUTHOR

R. H. Hardin Oct 14 2011


STATUS

approved



