A203247 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,3,2,1,2,0,2 for x=0,1,2,3,4,5,6

1, 2, 17, 113, 2322, 85980, 5342846, 734241654, 188881825778, 92081925477645

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 1'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..............2
.......2.2............1.3............1.1............0.0............2.2
......2.6.2..........0.1.1..........1.3.0..........0.5.0..........3.1.0
.....0.2.2.0........0.0.2.2........2.2.0.0........2.2.0.0........1.1.2.2
....0.0.4.0.1......2.2.4.2.0......0.2.4.2.2......0.2.4.2.2......2.2.4.2.0
...0.5.2.2.1.3....2.6.2.0.5.0....0.5.0.2.6.2....2.1.3.2.6.2....2.6.2.0.5.0
..0.0.0.2.0.0.1..0.2.2.0.0.0.0..0.0.0.0.2.2.0..2.2.1.1.2.2.0..0.2.2.0.0.0.0

Crossrefs

Sequence in context: A100274 A213785 A198158 * A294271 A203123 A198043

Adjacent sequences: A203244 A203245 A203246 * A203248 A203249 A203250

Keyword

nonn

Author

R. H. Hardin Dec 30 2011

Status

approved