A197754 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,4,3,0,1,0,0 for x=0,1,2,3,4,5,6

1, 1, 7, 46, 620, 15146, 684630, 56031069, 8451164309, 2311439501298

Offset

1,3

Comments

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

All solutions with all values from 0 to 6 for 6X6X6
.......0............0............0............1............1............0
......2.3..........0.0..........3.2..........4.1..........1.4..........0.0
.....3.0.0........0.6.0........0.0.3........1.1.0........0.1.1........0.6.0
....0.0.5.0......1.0.0.3......0.5.0.0......0.0.5.0......0.5.0.0......3.0.0.1
...0.6.0.1.1....4.1.5.0.2....1.1.0.6.0....0.6.0.0.3....3.0.0.6.0....2.0.5.1.4
..0.0.0.1.4.1..1.1.0.0.3.0..1.4.1.0.0.0..0.0.0.3.2.0..0.2.3.0.0.0..0.3.0.0.1.1

Crossrefs

Sequence in context: A203267 A319601 A352693 * A000823 A036944 A068640

Adjacent sequences: A197751 A197752 A197753 * A197755 A197756 A197757

Keyword

nonn

Author

R. H. Hardin Oct 17 2011

Status

approved