A217231 Number of triangular nXnXn arrays of occupancy after each element moves to some neighbor but without 2-loops and with no occupancy greater than 5.

0, 1, 47, 5227, 2001776, 2840672270, 15140206096832

Offset

1,3

Comments

Column 5 of A217232.

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for n=4
.....0........0........0........0........1........0........0........0
....1.3......1.0......2.0......1.0......1.0......3.0......1.1......1.1
...1.1.2....2.3.1....2.2.3....1.5.0....2.2.1....1.2.2....1.1.2....2.1.2
..1.0.0.1..0.0.3.0..1.0.0.0..1.1.1.0..0.2.0.1..1.0.1.0..0.2.2.0..0.1.1.1

Crossrefs

Sequence in context: A194617 A217229 A217230 * A141797 A101629 A362714

Adjacent sequences: A217228 A217229 A217230 * A217232 A217233 A217234

Keyword

nonn,hard,more

Author

R. H. Hardin, Sep 28 2012

Status

approved