A198090 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,0,2,1,0,0,2 for x=0,1,2,3,4,5,6

1, 5, 17, 92, 1017, 23269, 789910, 53978753, 6677975379, 1487161118854

Offset

1,2

Comments

Every 0 is next to 0 3'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..10.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......0.0............0.0............0.0............0.0............0.0
......0.5.0..........0.5.0..........1.2.2..........0.4.1..........1.4.0
.....0.0.2.2........4.0.2.2........3.2.6.2........4.0.1.3........3.1.0.4
....0.0.2.6.2......0.0.2.6.2......1.1.2.2.0......0.0.2.2.1......1.2.2.0.0
...0.4.1.2.2.1....0.4.1.2.2.0....0.4.0.0.5.0....0.5.2.6.2.0....0.2.6.2.5.0
..0.0.1.3.1.0.1..0.0.1.3.1.0.0..0.0.0.4.0.0.0..0.0.0.2.2.0.0..0.0.2.2.0.0.0

Crossrefs

Sequence in context: A250744 A197875 A203116 * A262862 A367921 A180382

Adjacent sequences: A198087 A198088 A198089 * A198091 A198092 A198093

Keyword

nonn

Author

R. H. Hardin Oct 21 2011

Status

approved