a(0) = 1; thereafter a(n) = A105749(n)/n.

A144905

a(0) = 1; thereafter a(n) = A105749(n)/n.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =74a(4) =1596a(5) =58344a(6) =3240840a(7) =254535840a(8) =26862378480

External references