A198000 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,3,1,1,1,0,1 for x=0,1,2,3,4,5,6

1, 1, 25, 149, 2838, 341621, 23074917, 4770466713, 3230855421145

Offset

1,3

Comments

Every 0 is next to 0 6's, every 1 is next to 1 3's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1'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..9.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............1
.......0.1............0.0............3.1............1.0............2.3
......0.2.3..........0.5.0..........1.1.4..........3.0.0..........0.1.1
.....0.0.1.1........1.0.3.1........1.6.1.1........1.1.2.0........1.1.6.1
....0.0.1.6.1......3.1.1.1.0......3.1.1.3.0......1.6.1.0.0......0.3.1.1.3
...0.5.3.1.1.3....1.4.1.6.1.2....1.4.1.0.5.0....3.1.1.3.5.0....0.5.0.1.4.1
..0.0.0.1.4.1.0..2.1.3.1.1.3.1..2.1.3.1.0.0.0..0.1.4.1.0.0.0..0.0.0.1.3.1.0

Crossrefs

Sequence in context: A147421 A147083 A198030 * A247664 A168571 A197998

Adjacent sequences: A197997 A197998 A197999 * A198001 A198002 A198003

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved