Number of n X 3 0..6 arrays with no element equal to another at a city block distance of exactly two, and new values 0..6 introduced in row major order.

A222778

Number of n X 3 0..6 arrays with no element equal to another at a city block distance of exactly two, and new values 0..6 introduced in row major order.

Terms

    a(0) =3a(1) =34a(2) =969a(3) =64752a(4) =5227536a(5) =436214328a(6) =36601614264

External references