A197161 - OEIS

A197161

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

1, 5, 66, 2573, 331406, 135820428, 178698032203, 752158409985973, 10105549470186567265

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

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

Diagonal of A197167

LINKS

EXAMPLE

Some solutions for n=4

..0..0..0..1....1..2..0..0....0..0..0..0....0..0..0..1....1..2..1..1

..2..1..1..2....0..1..0..0....0..0..1..0....1..0..0..2....0..0..1..2

..1..0..0..0....1..0..0..0....1..1..2..0....2..1..0..1....0..0..1..0

..1..2..1..0....2..1..0..0....2..1..0..0....0..0..0..0....0..0..2..1

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved