794081domain: NAppears in sequencesE.g.f.: exp(x + 2*x^2 + 3*x^3).at n=8A293716Square array A(n,k), n >= 0, k >= 1, read by antidiagonals, where column k is the expansion of e.g.f. exp(Sum_{j=1..k} j*x^j).at n=63A293718