A205078 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,0,0,1,1,0,1 for x=0,1,2,3,4,5,6

1, 7, 18, 139, 2263, 33868, 1366867, 93953872, 8556279399

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 0's, every 3 is next to 3 1's, every 4 is next to 4 1's, every 5 is next to 5 0's, every 6 is next to 6 1's

Links

Table of n, a(n) for n=1..9.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............1..............0..............0
.......0.0............0.1............1.0............0.0............2.1
......0.5.0..........1.1.3..........3.1.1..........0.5.0..........0.1.3
.....2.0.2.1........1.6.1.2........2.1.6.1........1.2.0.2........1.1.4.1
....3.1.1.4.3......0.1.1.0.0......0.0.1.1.0......1.4.1.1.3......1.6.1.2.0
...1.1.6.1.1.1....2.2.4.2.5.0....0.5.2.4.1.2....0.2.1.6.1.1....0.1.1.0.5.0
..1.0.1.1.0.2.0..1.0.1.1.0.0.2..2.0.0.1.3.1.0..1.2.0.1.1.0.1..1.1.3.2.0.0.0

Crossrefs

Sequence in context: A198031 A203118 A197656 * A198023 A202761 A196219

Adjacent sequences: A205075 A205076 A205077 * A205079 A205080 A205081

Keyword

nonn

Author

R. H. Hardin Jan 21 2012

Status

approved