79345346domain: NAppears in sequencesExpansion of e.g.f. 1/(4 - exp(x) - exp(2*x) - exp(3*x)).at n=6A004701Square array A(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of e.g.f. 1/(1 + k - Sum_{j=1..k} exp(j*x)).at n=51A320253