3543630domain: NAppears in sequencesExpansion of e.g.f.: 1/(exp(x)*(2-exp(x))).at n=9A052841Matrix inverse of triangle A227342.at n=47A227343Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} (k*j)!* Stirling2(n,k*j).at n=75A357868