A197448 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4

11, 321, 15410, 585194, 23829080, 982926107, 40087361395, 1640477445822, 67160665746869, 2747685400705119, 112433629005651948, 4600917175526994358, 188267595598497672073, 7703877269427034462338, 315242428170240015474340

Offset

1,1

Comments

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

Column 6 of A197450

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions containing all values 0 to 4 for n=4
..1..1..0..0..3..0....2..1..1..0..1..1....0..0..0..1..2..1....0..0..0..0..1..1
..2..2..3..0..0..3....1..0..0..0..0..0....0..0..0..1..2..1....1..3..0..4..0..0
..1..1..0..0..4..0....1..0..4..0..0..0....0..0..4..0..3..0....1..0..0..0..0..3
..0..0..3..0..0..0....0..3..0..0..3..0....0..0..0..3..0..0....2..1..1..0..0..0

Crossrefs

Sequence in context: A200749 A324422 A270815 * A241127 A268551 A108274

Adjacent sequences: A197445 A197446 A197447 * A197449 A197450 A197451

Keyword

nonn

Author

R. H. Hardin Oct 15 2011

Status

approved