A197940 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,0,0,2,2,1,0 for x=0,1,2,3,4,5,6.

1, 7, 18, 121, 2026, 34398, 1275080, 91741129, 9428552267

Offset

1,2

Comments

Every 0 is next to 0 5'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 1'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..............0..............2..............2..............0
.......2.0............1.1............0.0............0.0............2.0
......3.2.0..........1.5.1..........0.6.0..........0.6.0..........3.2.0
.....2.4.2.0........0.2.1.0........0.0.0.2........0.0.0.0........2.4.2.0
....0.0.2.1.1......0.0.2.2.0......1.2.2.4.3......2.2.3.2.1......0.0.2.1.1
...0.6.0.2.5.1....0.6.0.4.2.0....1.5.1.2.2.2....0.4.2.1.5.1....0.6.0.2.5.1
..2.0.0.0.1.1.0..0.0.0.2.3.2.0..0.1.1.0.0.0.0..1.2.0.0.1.1.0..0.0.0.0.1.1.0

Crossrefs

Sequence in context: A197938 A207153 A203222 * A196220 A198031 A203118

Adjacent sequences: A197937 A197938 A197939 * A197941 A197942 A197943

Keyword

nonn

Author

R. H. Hardin, Oct 19 2011

Status

approved