A197741 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,1,2,2,1,2,0 for x=0,1,2,3,4,5,6

1, 5, 20, 179, 3353, 108281, 6601649, 818828659, 196362508518, 91040908551719

Offset

1,2

Comments

Every 0 is next to 0 5's, every 1 is next to 1 1's, every 2 is next to 2 2's, every 3 is next to 3 2's, every 4 is next to 4 1's, every 5 is next to 5 2'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 0 to 6 for 8X8X8
.........0................0................2................0
........2.2..............2.0..............2.2..............0.2
.......2.5.2............2.2.0............3.1.1............1.2.2
......2.5.2.0..........3.3.0.1..........2.2.4.0..........1.4.1.3
.....0.2.2.0.0........2.2.1.4.1........0.2.1.1.0........0.0.1.2.2
....1.0.3.0.6.0......2.5.2.1.0.0......0.0.0.2.2.2......0.6.0.2.5.2
...1.4.1.2.0.0.1....2.5.2.0.0.6.0....0.6.0.2.5.5.2....1.0.0.2.5.2.0
..0.0.1.2.2.0.0.1..0.2.2.1.1.0.0.0..0.0.0.0.2.2.2.0..1.0.0.0.2.2.0.0

Crossrefs

Sequence in context: A318433 A205338 A197857 * A189317 A203902 A000877

Adjacent sequences: A197738 A197739 A197740 * A197742 A197743 A197744

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved