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A217229 Number of triangular nXnXn arrays of occupancy after each element moves to some neighbor but without 2-loops and with no occupancy greater than 3. 0
0, 1, 47, 4830, 1686393, 2096316167 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 3 of A217232

LINKS

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

EXAMPLE

Some solutions for n=4

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

....2.0......0.2......0.1......1.1......2.1......1.1......2.2......0.1

...1.1.2....2.1.1....0.3.2....2.0.1....0.3.1....1.1.2....1.1.1....1.2.1

..0.0.3.1..0.1.3.0..0.2.2.0..0.2.2.0..0.2.0.1..0.1.2.1..0.2.0.1..1.0.2.1

CROSSREFS

Sequence in context: A104069 A334180 A194617 * A217230 A217231 A141797

Adjacent sequences:  A217226 A217227 A217228 * A217230 A217231 A217232

KEYWORD

nonn,hard,more

AUTHOR

R. H. Hardin Sep 28 2012

STATUS

approved

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Last modified January 25 06:41 EST 2022. Contains 350565 sequences. (Running on oeis4.)