A197899 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,5,0,0,2,0,2 for x=0,1,2,3,4,5,6

1, 4, 12, 131, 2261, 68915, 3936847, 398896240, 73105887206, 24124756465130

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 5'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 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 8X8X8
.........0................0................2................0
........0.1..............2.2..............0.0..............3.2
.......0.5.0............0.4.0............0.5.0............0.0.2
......3.0.0.2..........0.2.2.0..........3.0.1.3..........2.2.2.0
.....0.2.2.4.2........2.2.6.2.3........0.2.2.0.0........0.2.6.2.2
....2.2.6.2.0.0......1.0.2.2.0.0......0.2.6.2.5.0......3.0.2.2.0.1
...3.0.2.2.0.5.3....0.5.0.3.0.0.0....2.4.2.2.0.0.0....0.5.0.4.0.5.0
..0.0.0.2.0.0.0.0..2.0.0.0.2.2.3.0..0.2.0.0.3.0.0.2..2.0.0.2.2.0.0.0

Crossrefs

Sequence in context: A367885 A053551 A009663 * A002029 A204321 A152121

Adjacent sequences: A197896 A197897 A197898 * A197900 A197901 A197902

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved