A197939 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 6,0,1,2,1,1,1 for x=0,1,2,3,4,5,6

1, 4, 10, 68, 882, 9972, 355820, 18442496, 1309834738

Offset

1,2

Comments

Every 0 is next to 0 6's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 2'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 7X7X7
........0..............0..............0..............0..............0
.......1.1............1.2............2.1............1.2............1.2
......1.6.1..........1.3.1..........1.3.1..........1.5.1..........1.5.1
.....0.1.1.0........0.2.2.0........0.2.2.0........0.1.1.0........0.1.1.0
....1.2.4.1.1......1.1.4.1.1......2.1.4.1.1......1.2.4.1.1......1.1.4.2.1
...1.3.2.1.5.1....1.6.1.1.5.2....1.5.1.1.6.1....2.3.2.1.6.1....1.6.1.2.3.1
..0.2.1.0.1.2.0..0.1.1.0.1.1.0..0.1.1.0.1.1.0..0.1.1.0.1.1.0..0.1.1.0.1.2.0

Crossrefs

Sequence in context: A146304 A189893 A355375 * A207160 A244297 A207159

Adjacent sequences: A197936 A197937 A197938 * A197940 A197941 A197942

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved