

A196449


Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,4,1 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 2's, every 3 is next to 3 4's, every 4 is next to 4 1's
Diagonal of A196456


LINKS

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


EXAMPLE

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


CROSSREFS

Sequence in context: A284195 A053677 A204563 * A281262 A186196 A196478
Adjacent sequences: A196446 A196447 A196448 * A196450 A196451 A196452


KEYWORD

nonn


AUTHOR

R. H. Hardin Oct 02 2011


STATUS

approved



