157896domain: NAppears in sequencesa(n) = n! * Sum_{d|n} d^n / d!.at n=5A354890Expansion of e.g.f. (1/x) * Series_Reversion( x * exp(-x * B(x)^3) ), where B(x) = 1 + x*B(x)^3 is the g.f. of A001764.at n=5A382037