Number of triangular n X n X n arrays of occupancy after each element either stays or moves to some neighbor and with no occupancy greater than 3.
A217505
Number of triangular n X n X n arrays of occupancy after each element either stays or moves to some neighbor and with no occupancy greater than 3.
Terms
- a(0) =1a(1) =10a(2) =306a(3) =34489a(4) =14162520a(5) =21101953059
External references
- oeis: A217505