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A217230 Number of triangular nXnXn arrays of occupancy after each element moves to some neighbor but without 2-loops and with no occupancy greater than 4. 0
0, 1, 47, 5167, 1950380, 2709368919 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 4 of A217232.

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

.....1........0........0........0........0........0........0........1

....2.1......1.1......2.2......2.0......1.1......1.0......0.2......1.2

...2.0.1....2.1.0....0.2.3....1.2.0....0.2.0....0.4.1....3.1.1....1.0.1

..0.2.1.0..0.3.2.0..0.1.0.0..0.3.1.1..0.3.2.1..1.2.1.0..1.1.0.1..1.2.0.1

CROSSREFS

Sequence in context: A334180 A194617 A217229 * A217231 A141797 A101629

Adjacent sequences:  A217227 A217228 A217229 * A217231 A217232 A217233

KEYWORD

nonn,hard,more

AUTHOR

R. H. Hardin, Sep 28 2012

STATUS

approved

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Last modified May 25 21:44 EDT 2022. Contains 354071 sequences. (Running on oeis4.)