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A217242 Number of triangular nXnXn arrays of occupancy after each element moves to some neighbor and with no occupancy greater than 4. 0
0, 7, 182, 22484, 10146841, 17541907856 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A217245

LINKS

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

EXAMPLE

Some solutions for n=4

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

....2.0......0.2......0.2......3.2......2.0......1.1......2.0......1.4

...3.1.0....1.0.0....0.1.4....1.1.0....3.0.1....2.0.0....1.4.0....1.0.1

..0.2.1.0..0.2.2.1..0.2.1.0..0.1.1.1..1.1.2.0..2.0.2.2..0.0.2.1..1.0.2.0

CROSSREFS

Sequence in context: A302904 A059382 A158620 * A217243 A217244 A152436

Adjacent sequences:  A217239 A217240 A217241 * A217243 A217244 A217245

KEYWORD

nonn,hard,more

AUTHOR

R. H. Hardin Sep 28 2012

STATUS

approved

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Last modified October 22 13:15 EDT 2021. Contains 348170 sequences. (Running on oeis4.)