A197950 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,3,2,2,2,0,2 for x=0,1,2,3,4,5,6

1, 2, 5, 12, 380, 5266, 190306, 27564773, 5837876758, 2655396520136

Offset

1,2

Comments

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

Links

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

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......2.2............0.0............2.2............2.2............2.2
......2.6.2..........0.5.0..........2.6.2..........2.6.2..........2.6.2
.....0.2.2.0........0.0.2.2........0.2.2.0........0.2.2.0........0.2.2.0
....0.0.4.1.1......2.2.4.2.3......1.0.4.0.0......1.0.4.0.0......1.1.4.0.0
...0.5.2.2.3.2....2.6.2.0.1.2....2.3.2.2.5.0....2.3.2.2.5.0....2.3.2.2.5.0
..0.0.0.2.1.2.2..0.2.2.0.0.2.2..2.2.1.2.0.0.0..2.2.0.2.0.0.0..2.2.0.2.0.0.0

Crossrefs

Sequence in context: A060807 A041095 A041333 * A041715 A042241 A042911

Adjacent sequences: A197947 A197948 A197949 * A197951 A197952 A197953

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved