35351663831domain: NAppears in sequencesa(n) = n! * [x^n] 1/(1 - n + exp(x)*(exp(n*x) - 1)/(exp(x) - 1)).at n=6A319509Expansion of e.g.f. 1 / (-5 + Sum_{k=1..6} exp(-k*x)).at n=6A366301