1/7 of the number of 7-colorings of a planar n X n X n triangular grid.

A153470

1/7 of the number of 7-colorings of a planar n X n X n triangular grid.

Terms

    a(0) =1a(1) =30a(2) =3750a(3) =1953750a(4) =4242798750

External references