Number of nX3 array permutations with each element moved no more than a city block distance of two.

A188954

Number of nX3 array permutations with each element moved no more than a city block distance of two.

Terms

    a(0) =6a(1) =362a(2) =29172a(3) =1722256a(4) =104735558a(5) =6513224285a(6) =402549615544

External references