A197936 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 3,1,2,2,0,0,0 for x=0,1,2,3,4,5,6

1, 5, 23, 271, 7281, 364631, 40739451, 9410295092, 4578833628410

Offset

1,2

Comments

Every 0 is next to 0 3's, every 1 is next to 1 1's, every 2 is next to 2 2's, every 3 is next to 3 2's, every 4 is next to 4 0'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..............0..............0..............0..............0
.......0.0............0.0............0.4............0.1............4.0
......0.0.0..........0.0.0..........1.0.0..........0.0.1..........0.0.0
.....0.6.0.0........0.5.2.2........1.0.6.0........0.5.2.2........0.5.2.2
....1.0.0.5.0......4.0.0.2.3......0.0.0.0.1......0.0.0.2.3......0.0.0.2.3
...2.1.2.2.0.4....0.0.6.0.1.2....0.5.2.2.1.2....0.0.6.0.1.2....0.0.6.0.1.2
..2.2.3.2.0.0.0..0.0.0.0.1.2.2..0.0.0.2.3.2.2..0.4.0.0.1.2.2..0.4.0.0.1.2.2

Crossrefs

Sequence in context: A361403 A116652 A361362 * A198029 A072104 A086797

Adjacent sequences: A197933 A197934 A197935 * A197937 A197938 A197939

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved