A198049 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 1,5,2,2,0,2,0 for x=0,1,2,3,4,5,6

1, 2, 8, 38, 554, 8027, 260677, 15253597, 1429110202, 256355182462, 80077276797247

Offset

1,2

Comments

Every 0 is next to 0 1'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 2's, every 6 is next to 6 0's

Links

Table of n, a(n) for n=1..11.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........2..............2..............2..............0..............0
.......2.2............2.2............2.2............2.2............2.2
......0.0.3..........0.0.3..........0.3.3..........2.1.2..........2.1.2
.....0.4.2.2........4.0.2.2........4.0.2.2........2.5.2.0........2.5.2.0
....0.0.2.1.2......0.0.2.5.2......0.0.2.1.2......3.2.2.0.0......3.2.2.0.0
...0.6.0.2.5.2....0.6.0.2.1.2....0.6.0.2.5.2....2.0.0.0.6.0....2.0.4.0.6.0
..0.0.0.0.2.2.0..0.0.0.0.2.2.0..0.0.0.0.2.2.0..2.2.0.4.0.0.0..2.2.0.0.0.0.0

Crossrefs

Sequence in context: A318917 A203122 A207157 * A198092 A207162 A101714

Adjacent sequences: A198046 A198047 A198048 * A198050 A198051 A198052

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved