Number of ways to reciprocally link elements of an 7Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.

A220568

Number of ways to reciprocally link elements of an 7Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.

Terms

    a(0) =1a(1) =610a(2) =27716a(3) =3128843a(4) =252139015a(5) =22926570957

External references