A197997 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,3,0,1,2,0,0 for x=0,1,2,3,4,5,6

1, 4, 9, 59, 387, 4969, 87553, 2358187, 102676311, 6725836038

Offset

1,2

Comments

Every 0 is next to 0 3's, every 1 is next to 1 3's, every 2 is next to 2 0's, every 3 is next to 3 1's, every 4 is next to 4 2'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
........0..............1..............0..............0..............0
.......0.2............3.1............0.2............2.0............0.0
......2.2.4..........1.2.2..........2.2.4..........4.2.2..........0.6.0
.....2.0.2.2........2.0.0.0........2.0.2.2........2.2.0.2........2.0.0.0
....1.0.5.0.0......2.0.5.0.0......1.0.5.0.0......0.0.5.0.1......4.2.5.0.2
...3.2.0.0.6.0....0.2.2.0.6.0....3.2.0.0.6.0....0.6.0.0.2.3....2.2.0.0.2.1
..1.1.2.0.0.0.2..0.2.4.2.0.0.0..1.1.2.0.0.0.0..0.0.0.0.2.1.1..0.0.2.2.1.3.1

Crossrefs

Sequence in context: A152284 A109717 A197859 * A309444 A198178 A013571

Adjacent sequences: A197994 A197995 A197996 * A197998 A197999 A198000

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved