

A196725


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


1




OFFSET

1,2


COMMENTS

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


LINKS



EXAMPLE

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


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



