A197473 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4

4, 50, 374, 2824, 22672, 165200, 1265828, 9507212, 72145488, 544829612, 4121917612, 31166838320, 235726500646, 1782712177744, 13482608699280, 101968288116918, 771180418816752, 5832406885650952, 44110365514811080

Offset

1,1

Comments

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

Column 6 of A197475

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

Crossrefs

Sequence in context: A189894 A275291 A240396 * A219566 A202790 A231833

Adjacent sequences: A197470 A197471 A197472 * A197474 A197475 A197476

Keyword

nonn

Author

R. H. Hardin Oct 15 2011

Status

approved