A197875 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,0,2,2,0,2,1 for x=0,1,2,3,4,5,6

1, 5, 17, 92, 906, 20440, 603251, 32383960, 2816154458, 404106713108

Offset

1,2

Comments

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

Links

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

Example

Some solutions with all values from 0 to 6 for 8X8X8
.........0................0................0................1
........0.0..............2.2..............1.1..............1.0
.......1.4.0............2.5.2............1.6.1............3.2.2
......2.2.0.0..........2.0.2.3..........0.1.1.0..........2.2.5.2
.....0.2.1.2.2........0.2.0.2.1........2.2.2.2.0........2.1.0.2.0
....1.1.3.2.5.2......1.1.2.1.2.0......2.5.0.1.2.0......0.2.1.2.1.1
...1.6.1.2.0.2.1....1.6.1.2.2.0.4....0.2.2.1.2.4.0....0.4.2.2.1.6.1
..0.1.1.0.2.2.1.0..0.1.1.0.0.0.0.0..1.1.3.2.2.0.0.0..0.0.0.0.0.1.1.0

Crossrefs

Sequence in context: A309175 A179684 A250744 * A203116 A198090 A262862

Adjacent sequences: A197872 A197873 A197874 * A197876 A197877 A197878

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved