Fourth (m=3) column sequence of triangle A129467.

A130033

Fourth (m=3) column sequence of triangle A129467.

Terms

    a(0) =1a(1) =-20a(2) =508a(3) =-17544a(4) =808848a(5) =-48405888a(6) =3663035136a(7) =-342678781440

External references