A197073 - OEIS

A197073

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

1, 6, 51, 1407, 109286, 25822213, 17446576240, 34357189974652, 197907262786979354

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

Diagonal of A197079

LINKS

EXAMPLE

Some solutions for n=4

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

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

..0..1..0..1....2..2..0..0....1..2..2..1....0..0..4..0....0..2..2..1

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

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved