A195899 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,0,1,0,0,0,0 for x=0,1,2,3,4,5,6

1, 4, 16, 138, 2361, 68954, 3847840, 397723933, 77013373733, 27852983681710, 18823781848131319

Offset

1,2

Comments

Every 0 is next to 0 2's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0'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..11.

Example

Some solutions with all values from 0 to 6 for 6X6X6
.......0............0............0............2............0............2
......0.0..........0.0..........0.0..........1.1..........0.0..........1.1
.....0.6.0........0.6.0........0.6.0........0.3.0........0.5.3........0.4.0
....0.0.0.4......3.0.0.0......0.0.0.0......0.0.5.0......0.0.0.0......0.0.0.3
...1.3.5.0.0....0.5.0.4.1....3.5.0.4.1....0.6.0.0.0....0.6.0.4.1....0.6.0.5.0
..2.1.0.0.0.0..0.0.0.0.1.2..0.0.0.0.1.2..0.0.0.4.0.0..0.0.0.0.1.2..0.0.0.0.0.0

Crossrefs

Sequence in context: A061129 A061131 A136651 * A362143 A358289 A156482

Adjacent sequences: A195896 A195897 A195898 * A195900 A195901 A195902

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved