A197970 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 4,5,0,2,2,0,0 for x=0,1,2,3,4,5,6

1, 4, 9, 44, 396, 6005, 151055, 6363817, 495956557, 63984803623

Offset

1,2

Comments

Every 0 is next to 0 4's, every 1 is next to 1 5'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..10.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............2..............0
.......0.2............0.0............0.0............0.0............2.0
......0.2.4..........0.6.0..........0.6.0..........0.0.0..........4.2.0
.....2.3.2.2........0.0.0.2........2.0.0.0........2.0.6.0........2.2.3.2
....2.0.0.0.0......0.5.0.2.4......4.2.0.0.0......4.2.0.0.0......0.0.0.1.0
...0.1.5.0.6.0....0.0.1.3.2.2....2.2.3.0.5.0....2.2.3.1.5.0....0.6.0.5.0.0
..0.0.0.0.0.0.0..0.0.0.2.0.0.0..0.0.0.2.1.0.0..0.0.0.2.0.0.2..2.0.0.0.0.0.0

Crossrefs

Sequence in context: A149170 A357447 A024053 * A048892 A108849 A375910

Adjacent sequences: A197967 A197968 A197969 * A197971 A197972 A197973

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved