A205073 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,6,2,0,0,0,1 for x=0,1,2,3,4,5,6

1, 2, 11, 112, 2268, 92150, 7515148, 1221031371, 396806745111, 257778320464215

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 6's, every 2 is next to 2 2'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 1'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
.......1.1............0.3............0.3............1.1............0.3
......1.6.1..........3.0.2..........0.4.0..........1.6.1..........0.4.0
.....0.1.1.0........0.3.2.2........0.0.4.0........0.1.1.0........0.0.5.0
....0.0.0.5.0......0.5.0.1.1......0.5.0.1.1......0.4.0.5.0......1.1.0.0.0
...0.5.4.0.0.2....4.0.0.1.6.1....2.3.0.1.6.1....2.3.0.0.0.0....1.6.1.2.0.0
..0.0.0.3.0.2.2..0.0.0.0.1.1.0..2.2.0.0.1.1.0..2.2.0.4.0.4.0..0.1.1.2.2.3.0

Crossrefs

Sequence in context: A099933 A098437 A145163 * A069574 A090534 A371697

Adjacent sequences: A205070 A205071 A205072 * A205074 A205075 A205076

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved