A197951 Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 5,5,3,0,0,1,0 for x=0,1,2,3,4,5,6

1, 1, 7, 72, 1045, 34736, 2260659, 267327524, 64601028921, 30441597686957

Offset

1,3

Comments

Every 0 is next to 0 5's, every 1 is next to 1 5's, every 2 is next to 2 3's, every 3 is next to 3 0's, every 4 is next to 4 0'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..10.

Example

Some solutions with all values from 0 to 6 for 7X7X7
........0..............0..............0..............0..............0
.......1.1............0.4............0.0............0.4............1.1
......1.5.1..........0.0.0..........0.6.0..........0.0.0..........1.5.1
.....0.1.3.0........0.0.6.0........0.0.0.0........0.6.0.0........0.3.1.0
....0.0.0.0.3......1.1.0.0.0......4.0.3.1.1......0.0.0.1.1......0.0.0.3.0
...0.0.6.0.2.0....1.5.3.0.0.3....0.0.3.2.5.1....3.0.0.3.5.1....0.6.0.4.2.0
..0.4.0.0.3.0.0..0.1.1.0.3.2.0..0.3.2.0.1.1.0..0.2.3.0.1.1.0..0.0.0.0.0.3.0

Crossrefs

Sequence in context: A306377 A230890 A203473 * A221161 A137730 A157920

Adjacent sequences: A197948 A197949 A197950 * A197952 A197953 A197954

Keyword

nonn

Author

R. H. Hardin Oct 19 2011

Status

approved