A197784 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,0,2,0,0,0,2 for x=0,1,2,3,4,5,6

1, 5, 26, 273, 6522, 313923, 29509789, 5665631766, 2183620544690, 1689035632968963

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 0'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 6X6X6
.......0............1............1............0............0............0
......2.2..........3.0..........0.3..........3.0..........0.0..........2.2
.....2.6.2........0.0.4........4.0.0........1.0.4........0.5.0........2.6.2
....1.2.2.0......2.2.0.0......0.0.2.2......2.2.0.0......2.2.0.4......0.2.2.1
...3.0.0.5.0....2.6.2.5.0....0.5.2.6.2....2.6.2.5.0....2.6.2.0.0....0.5.0.0.3
..0.0.4.0.0.0..0.2.2.0.0.0..0.0.0.2.2.0..0.2.2.0.0.0..0.2.2.1.3.0..0.0.0.4.0.0

Crossrefs

Sequence in context: A198157 A048690 A203198 * A279738 A106296 A295114

Adjacent sequences: A197781 A197782 A197783 * A197785 A197786 A197787

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved