A203117 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,0,0,2,0,0,0 for x=0,1,2,3,4,5,6

1, 7, 24, 208, 2539, 54394, 1993507, 127100730, 14090201105, 2730583715609

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 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..............2..............1..............0..............1
.......0.0............0.0............0.1............2.0............0.1
......2.0.0..........0.6.0..........1.2.2..........3.2.0..........0.4.2
.....3.2.5.0........0.0.0.4........3.2.0.0........2.1.2.2........4.0.0.0
....1.2.0.0.0......4.0.5.0.0......2.2.0.6.0......0.0.4.0.2......0.0.5.0.0
...0.4.0.0.6.0....0.0.0.2.2.2....0.0.5.0.0.0....0.6.0.0.5.0....0.6.0.2.2.2
..2.0.0.0.0.0.0..0.4.0.2.3.1.0..0.0.0.0.4.0.2..2.0.0.4.0.0.0..0.0.0.2.3.1.0

Crossrefs

Sequence in context: A012761 A209483 A209342 * A197791 A009652 A012777

Adjacent sequences: A203114 A203115 A203116 * A203118 A203119 A203120

Keyword

nonn

Author

R. H. Hardin Dec 29 2011

Status

approved