a(0) = 1; thereafter a(n) = A144422(n)/n.

A144906

a(0) = 1; thereafter a(n) = A144422(n)/n.

Terms

    a(0) =1a(1) =3a(2) =31a(3) =1684a(4) =271776a(5) =97484904a(6) =65617109160

External references