A217505 - OEIS

A217505

Number of triangular nXnXn arrays of occupancy after each element either stays or moves to some neighbor and with no occupancy greater than 3

1, 10, 306, 34489, 14162520, 21101953059, 113688398105827

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 3 of A217510

LINKS

EXAMPLE

Some solutions for n=4

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

....2.3......2.0......0.0......1.1......0.3......0.1......2.0......3.0

...2.0.2....0.2.0....3.1.0....2.0.2....1.3.3....0.1.2....2.0.0....1.0.2

..0.0.1.0..2.0.2.2..2.1.0.1..1.3.0.0..0.0.0.0..3.2.1.0..0.2.1.1..1.2.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved