A197961 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,2,1,1,1,1,0 for x=0,1,2,3,4,5,6

1, 4, 22, 186, 6317, 175347, 15968369, 2419381757, 643839941494

Offset

1,2

Comments

Every 0 is next to 0 5's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1'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
........2..............0..............0..............2..............0
.......1.1............0.0............0.0............1.1............0.0
......1.5.1..........0.6.0..........0.6.0..........1.4.1..........0.6.0
.....2.3.1.2........2.0.0.1........2.0.0.2........0.2.0.2........2.0.0.2
....0.1.0.0.0......1.1.0.2.1......1.1.3.1.1......0.0.1.3.1......1.1.3.1.1
...2.4.1.0.6.0....1.5.1.2.4.1....0.1.5.1.4.1....0.6.0.1.5.1....1.5.3.1.4.1
..1.1.1.2.0.0.0..0.2.1.3.1.1.2..0.2.1.1.2.2.1..0.0.0.2.1.1.2..2.1.1.2.0.2.1

Crossrefs

Sequence in context: A235329 A220231 A112370 * A203120 A002728 A364624

Adjacent sequences: A197958 A197959 A197960 * A197962 A197963 A197964

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved