A197484 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,4,1,0,0,0,0 for x=0,1,2,3,4,5,6

1, 1, 7, 93, 2584, 141328, 17631774, 4677852344, 2704563311389, 3400269169904466

Offset

1,3

Comments

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

Links

Table of n, a(n) for n=1..10.

Example

Some solutions with all values from 0 to 6 for 6X6X6
.......0............0............0............0............0............2
......0.0..........0.0..........0.0..........0.0..........3.0..........1.1
.....3.5.0........0.6.0........0.5.3........0.6.0........0.5.0........0.4.0
....0.0.0.0......0.0.0.0......0.0.0.0......0.0.0.3......0.0.0.0......0.0.0.0
...0.6.0.4.1....0.5.0.4.1....0.6.0.4.1....1.4.0.5.0....1.4.0.6.0....0.5.0.6.0
..0.0.0.0.1.2..0.3.0.0.1.2..0.0.0.0.1.2..2.1.0.0.0.0..2.1.0.0.0.0..0.0.3.0.0.0

Crossrefs

Sequence in context: A337457 A346463 A346464 * A218835 A219417 A220405

Adjacent sequences: A197481 A197482 A197483 * A197485 A197486 A197487

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved