A203121 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,5,0,2,0,1,0 for x=0,1,2,3,4,5,6

1, 4, 15, 82, 945, 15723, 451445, 21871311, 1814656584, 255989384470

Offset

1,2

Comments

Every 0 is next to 0 5'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 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..............0..............0..............0..............0
.......0.0............1.1............4.0............1.1............0.4
......0.1.1..........1.5.1..........0.0.2..........1.5.1..........2.0.0
.....0.1.5.1........0.1.2.0........1.2.3.2........0.1.2.0........2.3.2.1
....0.0.1.2.0......0.0.0.4.0......1.5.1.0.0......0.0.0.4.0......0.0.1.5.1
...0.6.0.3.0.4....0.0.6.0.2.2....0.1.1.0.6.0....0.6.0.0.2.2....0.6.0.1.1.0
..0.0.0.2.2.0.0..2.0.0.0.2.3.0..0.0.2.0.0.0.0..2.0.0.0.2.3.0..0.0.0.0.2.0.0

Crossrefs

Sequence in context: A068313 A174661 A207161 * A232220 A129653 A081722

Adjacent sequences: A203118 A203119 A203120 * A203122 A203123 A203124

Keyword

nonn

Author

R. H. Hardin Dec 29 2011

Status

approved