A198001 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,5,2,0,0,2,0 for x=0,1,2,3,4,5,6

1, 2, 11, 106, 1866, 62687, 4073132, 495518389, 114972961293, 50791847794948

Offset

1,2

Comments

Every 0 is next to 0 5's, every 1 is next to 1 5'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 2'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 7X7X7
........0..............0..............0..............0..............0
.......0.0............2.2............2.2............3.0............0.3
......0.6.0..........2.5.2..........2.1.2..........0.4.0..........0.4.0
.....0.0.0.4........2.1.2.0........0.2.5.2........0.0.2.2........2.2.0.4
....2.2.2.0.0......0.2.2.0.0......0.0.2.2.0......0.0.2.1.2......2.1.2.0.0
...2.1.5.2.3.2....3.0.4.0.6.0....0.6.0.0.4.0....0.6.0.2.5.2....2.5.2.0.6.0
..0.2.2.2.0.2.2..0.3.0.0.0.0.0..0.0.0.4.0.3.0..0.0.0.0.2.2.0..0.2.2.0.0.0.0

Crossrefs

Sequence in context: A292428 A088690 A118805 * A207155 A292566 A365106

Adjacent sequences: A197998 A197999 A198000 * A198002 A198003 A198004

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved