A197781 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,2,1,1,1 for x=0,1,2,3,4

9, 1025, 39748, 1924263, 88309448, 4052348046, 186804530634, 8622121723045, 397804283640646, 18336405515418246, 845373728575358353, 38986854903558638616, 1797850629942273258934, 82902079988914118429426

Offset

1,1

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

Column 7 of A197782

Links

R. H. Hardin, Table of n, a(n) for n = 1..48

Example

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

Crossrefs

Sequence in context: A260029 A266321 A228293 * A197612 A004809 A099127

Adjacent sequences: A197778 A197779 A197780 * A197782 A197783 A197784

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved