A197900 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,4,2,0,1,1,1 for x=0,1,2,3,4,5,6

1, 2, 11, 88, 1756, 55005, 3706910, 487165419, 121319839455

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 4's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 1's, every 5 is next to 5 1'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 8X8X8
.........1................2................0................1
........4.1..............2.2..............1.0..............1.4
.......1.1.2............1.0.1............4.1.1............0.1.1
......1.5.2.2..........4.1.1.4..........1.1.1.4..........0.1.6.1
.....4.1.1.4.1........1.1.6.1.1........0.0.5.1.1........1.4.1.1.4
....1.1.6.1.1.1......3.0.1.1.5.0......0.2.1.1.6.1......2.1.0.5.1.1
...0.0.1.1.5.1.4....0.0.1.4.1.1.1....0.2.2.4.1.1.4....2.2.0.1.1.0.0
..0.3.1.4.1.0.1.1..0.0.0.0.0.1.4.1..0.3.0.1.0.0.1.1..0.0.0.1.4.1.3.0

Crossrefs

Sequence in context: A138739 A216831 A221864 * A106961 A215623 A099662

Adjacent sequences: A197897 A197898 A197899 * A197901 A197902 A197903

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved