A197776 - OEIS

A197776

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

1, 5, 67, 3021, 384758, 153517349, 186804530634, 694775899316423

(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 1's, every 4 is next to 4 1's

Diagonal of A197782

LINKS

EXAMPLE

Some solutions containing all values 0 to 4 for n=4

..2..1..3..1....0..2..1..1....2..1..3..1....1..3..1..2....1..3..1..2

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

..0..1..1..0....1..4..1..2....3..1..1..2....0..0..1..0....0..1..1..0

..1..2..2..1....2..1..3..1....1..2..0..1....0..0..2..1....1..2..2..1

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved