A197792 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,0,2,0,2,2,0 for x=0,1,2,3,4,5,6

1, 5, 23, 181, 2706, 73791, 3327225, 267114439, 38448796541

Offset

1,2

Comments

Every 0 is next to 0 4'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 2'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..9.

Example

Some solutions with all values from 0 to 6 for 8X8X8
.........2................1................1................0
........2.2..............3.0..............0.1..............2.2
.......0.0.3............0.0.0............0.2.2............2.5.2
......0.6.0.0..........0.6.0.0..........0.2.5.2..........1.2.4.2
.....3.0.0.0.0........0.0.0.0.0........0.0.2.4.2........3.0.2.5.2
....0.2.2.2.2.2......0.2.2.2.2.0......3.0.0.2.5.2......0.0.0.2.2.0
...0.2.5.4.1.0.2....3.2.5.4.5.2.0....3.0.6.0.2.2.1....3.0.6.0.0.0.0
..1.1.2.2.2.2.2.0..0.0.2.2.2.2.0.0..0.0.0.0.0.0.0.1..1.0.0.0.0.3.3.0

Crossrefs

Sequence in context: A332688 A198026 A198093 * A197793 A203115 A197628

Adjacent sequences: A197789 A197790 A197791 * A197793 A197794 A197795

Keyword

nonn

Author

R. H. Hardin Oct 18 2011

Status

approved