A197542 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,2,1,1,1 for x=0,1,2,3,4

4, 28, 61, 206, 494, 2095, 6279, 21530, 69977, 248366, 813400, 2838023, 9457181, 32284759, 108523371, 370702868, 1251432293, 4258479323, 14389442735, 48816423022, 165305055080, 561221682936, 1901461841900, 6447263273359

Offset

1,1

Comments

Every 0 is next to 0 2'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

Column 5 of A197545

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

Crossrefs

Sequence in context: A151912 A307135 A101002 * A203280 A085024 A085001

Adjacent sequences: A197539 A197540 A197541 * A197543 A197544 A197545

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved