n + n(n+1) + n(n+1)(n+2) + ..., with n terms.

A111685

n + n(n+1) + n(n+1)(n+2) + ..., with n terms.

Terms

    a(0) =1a(1) =8a(2) =75a(3) =984a(4) =17045a(5) =366288a(6) =9374967a(7) =278095760a(8) =9375293169a(9) =353906211240

External references