A198023 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,0,0,2,2,0,0 for x=0,1,2,3,4,5,6

1, 7, 18, 142, 1957, 32686, 1124222, 64876361, 5833413273

Offset

1,2

Comments

Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 0's, every 3 is next to 3 2's, every 4 is next to 4 2'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..9.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............1..............1..............0..............0
.......2.0............2.0............2.0............0.0............1.2
......4.2.0..........1.0.0..........0.5.0..........0.6.0..........1.2.0
.....2.2.3.2........1.2.5.0........0.0.0.2........2.0.0.0........2.0.5.0
....0.0.0.0.1......0.3.0.0.0......0.6.0.2.4......4.2.0.5.0......0.3.0.0.0
...0.6.0.5.2.1....0.2.2.0.6.0....0.0.0.3.2.2....2.2.3.0.2.2....0.2.2.0.6.0
..2.0.0.0.0.2.0..0.2.4.2.0.0.2..1.2.2.2.0.0.0..0.0.0.2.1.1.0..0.2.4.2.0.0.0

Crossrefs

Sequence in context: A203118 A197656 A205078 * A202761 A196219 A219772

Adjacent sequences: A198020 A198021 A198022 * A198024 A198025 A198026

Keyword

nonn

Author

R. H. Hardin Oct 20 2011

Status

approved