615764308672domain: NAppears in sequencesE.g.f. satisfies: A(x) = exp(x*A(((x+1)^9-1)/9)).at n=9A143640a(n) = n! * [x^n] A_n(x) with A_n(x) = exp(x*A_n(((x+1)^n-1)/n)) if n > 0 and A_0(x) = exp(x).at n=9A306578