a(n) = (n^3*a(n-1) - 1)/(n - 1) for n >= 2, with a(0) = 1, a(1) = 4.

A141827

a(n) = (n^3*a(n-1) - 1)/(n - 1) for n >= 2, with a(0) = 1, a(1) = 4.

Terms

    a(0) =1a(1) =4a(2) =31a(3) =418a(4) =8917a(5) =278656a(6) =12037939a(7) =688168846a(8) =50334635593

External references