Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 4 elements linked to themselves.

A271613

Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 4 elements linked to themselves.

Terms

    a(0) =1a(1) =4a(2) =26a(3) =307a(4) =2571a(5) =42702a(6) =3243689a(7) =132728354a(8) =1491326272a(9) =101843558868

External references