A198027 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,0,2,1,0,0,2 for x=0,1,2,3,4,5,6

1, 5, 17, 110, 1437, 32819, 1252159, 87764151, 10989915463

Offset

1,2

Comments

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

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......0.0............0.0............0.0............0.4............0.0
......1.2.2..........0.5.0..........0.0.4..........4.0.0..........4.0.0
.....3.2.6.2........2.2.0.0........0.5.0.0........0.0.5.0........0.0.5.0
....1.1.2.2.0......2.6.2.0.0......2.2.0.4.1......1.4.0.2.2......1.4.0.2.2
...0.4.0.0.5.0....1.2.2.1.4.0....2.6.2.0.1.3....1.1.0.2.6.2....1.1.0.2.6.2
..0.0.0.0.0.0.0..1.0.1.3.1.0.0..0.2.2.1.3.1.0..0.1.3.1.2.2.0..0.3.1.1.2.2.0

Crossrefs

Sequence in context: A067710 A197912 A203114 * A216924 A009240 A180387

Adjacent sequences: A198024 A198025 A198026 * A198028 A198029 A198030

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved