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

A217241

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

Terms

    a(0) =0a(1) =7a(2) =161a(3) =17957a(4) =6839199a(5) =9594137076

External references