A207158 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,0,0,2,2,1,0 for x=0,1,2,3,4,5,6

1, 7, 18, 83, 883, 8004, 137386, 3684780, 120845236, 6910251668

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..10.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............0..............0..............0
.......2.0............0.1............0.0............2.0............0.2
......3.2.0..........1.5.1..........0.6.0..........3.2.0..........0.2.3
.....2.4.2.0........2.1.1.0........2.0.0.2........2.4.2.0........0.2.4.2
....0.0.2.1.1......0.0.2.2.0......3.4.2.1.1......0.0.2.1.1......1.1.2.0.0
...0.6.0.2.5.1....0.6.0.4.2.0....2.2.2.1.5.0....0.6.0.2.5.1....1.5.2.0.6.0
..0.0.0.0.1.1.0..2.0.0.2.3.2.0..0.0.0.0.1.1.1..2.0.0.0.1.1.0..0.1.1.0.0.0.0

Crossrefs

Sequence in context: A262489 A030982 A203381 * A304992 A375356 A282092

Adjacent sequences: A207155 A207156 A207157 * A207159 A207160 A207161

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved