A198026 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,0,2,0,2,2,1 for x=0,1,2,3,4,5,6

1, 5, 23, 181, 2658, 73719, 3475863, 310712097, 52428144959

Offset

1,2

Comments

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

Links

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

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......2.2............0.3............2.2............1.1............1.1
......2.0.2..........2.2.0..........2.0.2..........1.6.1..........1.6.1
.....2.4.2.0........2.0.2.0........0.2.4.2........0.1.1.0........0.1.1.0
....2.5.2.1.1......2.4.2.1.1......1.1.2.5.2......0.2.2.2.2......2.2.2.2.0
...0.2.2.1.6.1....2.5.2.1.6.1....1.6.1.2.2.0....3.2.0.4.5.2....2.5.4.5.2.3
..0.3.0.0.1.1.0..0.2.2.0.1.1.0..0.1.1.0.0.3.0..0.0.2.2.2.2.0..0.2.2.2.2.0.0

Crossrefs

Sequence in context: A371651 A305127 A332688 * A198093 A197792 A197793

Adjacent sequences: A198023 A198024 A198025 * A198027 A198028 A198029

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved