A197994 Number of n X n X n 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,4,2,0,1,0,2 for x=0,1,2,3,4,5,6.

1, 2, 11, 95, 1963, 70225, 5408352, 818404797, 243161923228

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..9.

Example

Some solutions with all values from 0 to 6 for 7 X 7 X 7
........0..............0..............0..............0..............0
.......0.0............0.3............0.0............2.2............0.1
......2.2.0..........2.2.0..........0.1.1..........2.6.2..........1.4.1
.....2.6.2.1........2.6.2.0........2.2.4.1........0.2.2.0........0.0.1.0
....0.2.2.4.1......0.2.2.0.0......2.6.2.1.0......1.0.0.0.0......0.0.3.2.2
...0.5.0.1.1.0....0.5.0.3.1.1....0.2.2.0.5.0....4.1.0.0.5.0....3.5.0.2.6.2
..0.0.0.0.0.3.0..0.0.0.0.1.4.1..0.3.0.0.0.0.0..1.1.0.0.3.0.0..0.0.0.0.2.2.0

Crossrefs

Sequence in context: A098621 A266834 A131407 * A186273 A349290 A332239

Adjacent sequences: A197991 A197992 A197993 * A197995 A197996 A197997

Keyword

nonn

Author

R. H. Hardin, Oct 20 2011

Status

approved