A198048 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,0,0,0,2,1,0 for x=0,1,2,3,4,5,6

1, 7, 39, 392, 7251, 221673, 11897698, 1109783691, 179093402627, 50403959307911

Offset

1,2

Comments

Every 0 is next to 0 5's, every 1 is next to 1 0's, every 2 is next to 2 0's, every 3 is next to 3 0's, every 4 is next to 4 2's, every 5 is next to 5 1'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
........1..............2..............0..............0..............0
.......2.0............0.0............0.0............1.1............1.1
......0.2.2..........3.0.2..........0.6.0..........1.5.1..........1.5.1
.....3.2.4.0........0.2.4.2........0.0.0.3........0.2.1.0........0.2.1.0
....0.0.2.1.1......1.1.2.0.0......1.2.2.2.0......0.0.2.2.0......0.0.2.4.2
...0.6.0.2.5.1....1.5.2.0.6.0....1.5.1.4.2.3....0.6.0.2.4.2....0.6.0.2.2.0
..0.0.0.0.1.1.0..0.1.1.0.0.0.0..0.1.1.0.2.0.0..2.0.0.3.0.2.0..0.0.0.3.0.2.1

Crossrefs

Sequence in context: A138417 A207154 A203111 * A305361 A202763 A035357

Adjacent sequences: A198045 A198046 A198047 * A198049 A198050 A198051

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved