Number of n X 4 0..6 arrays with no element equal to another within a city block distance of two, and new values 0..6 introduced in row major order.

A206385

Number of n X 4 0..6 arrays with no element equal to another within a city block distance of two, and new values 0..6 introduced in row major order.

Terms

    a(0) =2a(1) =33a(2) =1368a(3) =67716a(4) =3328979a(5) =164270604a(6) =8094257014a(7) =399073153303

External references