451507161771domain: NAppears in sequencesE.g.f.: exp((1/(1-x)^9 - 1)/9).at n=10A293988a(0) = a(1) = 1 and a(n) = n! * [x^n] exp((1/(1-x)^(n-1) - 1)/(n-1)) for n > 1.at n=10A293989