A207162 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 1,3,2,2,0,0,0 for x=0,1,2,3,4,5,6

1, 2, 8, 38, 644, 11258, 477591, 38645905, 5336450490, 1462784939541

Offset

1,2

Comments

Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 2's, every 4 is next to 4 0's, every 5 is next to 5 0'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..............2..............2..............0..............0
.......0.0............2.2............2.2............4.0............0.4
......0.6.0..........1.3.0..........1.3.0..........0.0.2..........0.0.0
.....0.0.0.0........2.2.0.4........2.2.0.0........0.5.2.2........2.2.5.0
....0.5.0.4.0......0.2.0.0.0......0.2.0.0.4......0.0.0.3.1......1.2.0.0.4
...0.0.2.2.3.2....0.5.0.0.6.0....0.5.0.6.0.0....0.6.0.0.2.2....2.3.0.6.0.0
..0.4.0.2.1.2.2..0.0.0.0.0.0.0..0.0.0.0.0.0.0..0.0.0.0.0.2.0..2.2.0.0.0.0.0

Crossrefs

Sequence in context: A207157 A198049 A198092 * A101714 A077318 A082014

Adjacent sequences: A207159 A207160 A207161 * A207163 A207164 A207165

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved