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A217240 Number of triangular nXnXn arrays of occupancy after each element moves to some neighbor and with no occupancy greater than 2. 0
0, 7, 95, 6437, 1175140, 660602643 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A217245

LINKS

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

EXAMPLE

Some solutions for n=4

.....2........1........1........1........1........2........0........1

....0.2......0.1......1.1......1.1......2.1......0.1......1.2......0.1

...0.1.1....2.1.2....0.2.1....2.1.2....1.0.1....1.0.1....0.0.1....2.0.1

..0.1.2.1..2.1.0.0..0.2.0.2..1.0.1.0..2.0.2.0..2.2.1.0..1.2.1.2..1.0.2.2

CROSSREFS

Sequence in context: A156961 A239999 A054932 * A222834 A327676 A338075

Adjacent sequences:  A217237 A217238 A217239 * A217241 A217242 A217243

KEYWORD

nonn,hard,more

AUTHOR

R. H. Hardin Sep 28 2012

STATUS

approved

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Last modified October 21 14:42 EDT 2021. Contains 348155 sequences. (Running on oeis4.)