a(n) = n! * [x^n] -exp(-n*x)*LambertW(-x).

A290215

a(n) = n! * [x^n] -exp(-n*x)*LambertW(-x).

Terms

    a(0) =0a(1) =1a(2) =-2a(3) =18a(4) =-144a(5) =1900a(6) =-26820a(7) =485394a(8) =-9679936a(9) =225394488a(10) =-5765768100a(11) =164923889350

External references