A197996 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,5,2,2,0,1,2 for x=0,1,2,3,4,5,6

1, 2, 8, 44, 590, 9466, 311925, 20440139, 2099400825, 413055176319

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 5'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 1's, every 6 is next to 6 2'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
.......1.1............0.0............2.2............1.1............0.2
......1.5.1..........2.0.4..........2.6.2..........1.5.1..........0.2.2
.....2.0.1.0........2.2.0.0........3.2.2.0........0.1.0.0........1.1.3.3
....2.2.3.2.2......0.1.3.2.2......2.0.0.1.1......2.2.0.4.0......1.5.1.2.2
...0.0.0.2.6.2....1.5.1.2.6.2....2.2.4.1.5.0....2.6.2.3.2.0....0.0.1.2.6.2
..0.0.4.0.2.2.0..0.1.1.0.2.2.0..0.0.0.0.1.1.0..0.2.2.3.2.2.0..0.4.0.0.2.2.0

Crossrefs

Sequence in context: A002833 A348107 A139015 * A258622 A290442 A316367

Adjacent sequences: A197993 A197994 A197995 * A197997 A197998 A197999

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved