Number of nX7 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z.

A210787

Number of nX7 1..4 arrays with no element with value z exactly a city block distance of z from another element with value z.

Terms

    a(0) =3962a(1) =710895a(2) =23759000a(3) =890122678a(4) =37591420090

External references