A207163 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,5,0,2,0,0,0 for x=0,1,2,3,4,5,6

1, 4, 15, 106, 1305, 32391, 1555376, 143960245, 25735362359, 8760118832676, 5694607852912446

Offset

1,2

Comments

Every 0 is next to 0 3's, every 1 is next to 1 5's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 0's, every 5 is next to 5 0's, every 6 is next to 6 0's

Links

Table of n, a(n) for n=1..11.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........2..............0..............2..............0..............2
.......0.0............0.0............0.0............0.4............0.0
......2.0.0..........0.6.0..........0.6.0..........2.0.0..........0.5.1
.....3.2.5.0........0.0.0.0........4.0.0.2........3.2.5.0........4.0.0.2
....2.1.0.0.0......0.5.0.5.0......0.0.5.1.3......2.1.0.0.0......0.0.5.0.2
...0.0.5.0.6.0....0.0.1.2.0.4....0.5.0.0.2.2....0.0.5.0.6.0....0.6.0.1.2.0
..0.4.0.0.0.0.0..2.0.2.3.2.0.0..2.0.2.2.2.0.0..0.0.0.0.0.0.2..0.0.0.2.3.2.0

Crossrefs

Sequence in context: A221095 A339287 A081548 * A009315 A350484 A303654

Adjacent sequences: A207160 A207161 A207162 * A207164 A207165 A207166

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved