A198058 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,2,1,1,0,0,1 for x=0,1,2,3,4,5,6

1, 4, 25, 239, 9456, 423328, 55900189, 15136412831, 8243506243585

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 2's, every 2 is next to 2 1'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 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..............2..............2..............2..............2
.......0.0............1.1............1.1............1.1............1.1
......0.1.2..........1.6.1..........1.6.1..........1.6.1..........1.6.1
.....2.3.1.0........2.1.1.2........2.1.1.2........2.1.1.2........2.1.1.2
....1.1.0.5.0......0.3.0.0.0......0.0.3.0.0......0.3.1.0.0......0.0.3.0.0
...1.6.1.0.0.0....0.1.1.5.0.0....4.0.1.2.5.0....0.4.1.2.5.0....0.5.0.1.0.4
..2.1.1.2.0.4.0..0.0.2.0.0.4.0..0.0.0.1.0.0.0..0.0.0.0.0.0.0..0.0.1.2.0.0.0

Crossrefs

Sequence in context: A224080 A194569 A356000 * A099696 A345105 A220192

Adjacent sequences: A198055 A198056 A198057 * A198059 A198060 A198061

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved