A202760 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,4,2,0,2,0,0 for x=0,1,2,3,4,5,6

1, 2, 8, 59, 708, 17939, 732635, 53426336, 7044973436, 1649270266600

Offset

1,2

Comments

Every 0 is next to 0 4's, every 1 is next to 1 4's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 2'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..............0..............0..............0..............0
.......0.0............0.0............0.0............0.0............0.0
......0.6.0..........0.6.0..........0.5.3..........0.6.0..........0.5.0
.....0.0.0.0........0.0.0.0........0.0.0.0........0.0.0.0........3.3.0.0
....1.2.2.0.3......0.5.2.2.1......0.0.2.2.1......0.0.2.2.1......0.0.2.2.1
...2.4.2.0.5.0....0.0.0.2.4.2....0.6.0.2.4.2....0.5.0.2.4.2....0.6.0.2.4.2
..2.2.1.0.0.0.0..0.3.3.0.1.2.2..0.0.0.0.1.2.2..0.3.0.0.1.2.2..0.0.0.0.1.2.2

Crossrefs

Sequence in context: A197937 A205076 A205079 * A205075 A203217 A203208

Adjacent sequences: A202757 A202758 A202759 * A202761 A202762 A202763

Keyword

nonn

Author

R. H. Hardin Dec 23 2011

Status

approved