A205075 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,4,2,0,2,0,2 for x=0,1,2,3,4,5,6

1, 2, 8, 59, 717, 17639, 726313, 53764210, 7356398186, 1855827372064

Offset

1,2

Comments

Every 0 is next to 0 6'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 2'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
.......2.2............0.0............3.0............0.3............2.2
......2.6.2..........0.5.0..........0.2.2..........2.2.0..........2.6.2
.....0.2.2.0........0.0.2.2........1.2.6.2........2.6.2.1........0.2.2.0
....0.1.4.0.0......0.1.2.6.2......2.4.2.2.0......0.2.2.4.2......0.0.4.1.0
...0.3.2.2.5.0....0.2.4.2.2.0....2.2.3.0.5.0....0.5.0.1.2.2....0.5.2.2.0.3
..0.3.0.2.0.0.0..0.2.2.0.0.3.0..0.0.0.0.0.0.0..0.0.0.3.0.0.0..0.0.0.2.0.3.0

Crossrefs

Sequence in context: A205076 A205079 A202760 * A203217 A203208 A181010

Adjacent sequences: A205072 A205073 A205074 * A205076 A205077 A205078

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved