A197931 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,4,2,2,0,0,0 for x=0,1,2,3,4,5,6

1, 2, 8, 53, 1226, 44652, 3506927, 593996679, 208164218197, 152996945106872

Offset

1,2

Comments

Every 0 is next to 0 3's, every 1 is next to 1 4's, every 2 is next to 2 2'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..............2..............0
.......2.2............0.0............4.0............2.2............0.0
......0.0.0..........0.5.0..........0.0.2..........3.1.0..........0.6.0
.....2.2.5.0........2.2.0.0........0.5.2.2........2.2.4.0........0.0.0.0
....3.2.0.0.0......3.2.0.6.0......0.0.0.1.3......0.2.0.0.0......0.4.0.5.0
...2.1.4.0.6.0....2.1.4.0.0.0....0.6.0.4.2.2....0.5.0.0.6.0....2.1.2.2.0.2
..2.2.0.0.0.0.0..2.2.0.0.0.4.0..0.0.0.0.0.2.0..0.0.0.4.0.0.0..2.2.3.2.0.2.2

Crossrefs

Sequence in context: A203109 A197795 A327354 * A296788 A079503 A052694

Adjacent sequences: A197928 A197929 A197930 * A197932 A197933 A197934

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved