A197664 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,0,1,2,2,0,1 for x=0,1,2,3,4,5,6

1, 4, 10, 47, 489, 6519, 146513, 6298384, 434627282

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 2's, every 4 is next to 4 2's, every 5 is next to 5 0's, every 6 is next to 6 1's

Links

Table of n, a(n) for n=1..9.

Example

Some solutions with all values 0 to 6 for 8X8X8
.........0................0................0................0
........1.1..............1.1..............1.2..............1.1
.......1.6.1............1.6.1............2.2.1............1.6.1
......0.1.1.0..........0.1.1.0..........1.4.0.1..........0.1.1.0
.....1.2.3.2.0........0.2.3.2.1........0.2.2.1.2........0.2.3.2.1
....1.2.2.1.0.0......0.0.1.2.4.1......1.1.3.1.2.0......0.0.1.2.2.1
...0.2.4.1.2.5.0....0.5.2.1.2.2.0....1.6.1.2.0.5.0....0.5.2.1.4.2.0
..1.1.2.1.0.0.0.0..0.0.0.0.1.2.1.1..0.1.1.0.0.0.0.0..0.0.0.0.1.2.1.1

Crossrefs

Sequence in context: A149230 A115327 A233395 * A099606 A149231 A335873

Adjacent sequences: A197661 A197662 A197663 * A197665 A197666 A197667

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved