A207161 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,3,0,2,0,0,0 for x=0,1,2,3,4,5,6

1, 4, 15, 82, 807, 14322, 463561, 26995708, 2800506981, 514508270257

Offset

1,2

Comments

Every 0 is next to 0 3's, every 1 is next to 1 3'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..10.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........2..............0..............0..............0..............2
.......0.0............2.2............0.0............4.0............0.0
......0.0.2..........0.4.0..........0.0.2..........0.0.0..........0.6.0
.....0.5.2.3........2.0.0.4........0.5.2.3........2.0.6.0........4.0.0.0
....0.0.0.1.2......3.2.5.0.0......0.0.0.2.1......3.2.0.0.0......0.0.0.5.0
...0.6.0.0.0.0....1.2.0.0.6.0....4.0.6.0.4.0....2.1.2.5.0.4....4.0.1.2.0.0
..2.0.0.4.0.4.0..0.2.0.4.0.0.2..0.0.0.0.0.0.0..0.0.2.0.0.0.0..0.0.2.3.2.0.2

Crossrefs

Sequence in context: A350830 A068313 A174661 * A203121 A232220 A129653

Adjacent sequences: A207158 A207159 A207160 * A207162 A207163 A207164

Keyword

nonn

Author

R. H. Hardin Feb 15 2012

Status

approved