Number of nX3 1..6 arrays with no element with value z exactly a city block distance of z from another element with value z.

A209181

Number of nX3 1..6 arrays with no element with value z exactly a city block distance of z from another element with value z.

Terms

    a(0) =199a(1) =31185a(2) =3873287a(3) =364261071a(4) =24175529937

External references