2237921

Appears in sequences

• Expansion of e.g.f. exp(x*exp(x)).at n=10A000248
• Triangle T(n,k) = number of forests of labeled rooted trees of height at most 1, with n labels, where each root contains k labels, n>=0, 0<=k<=n.at n=56A143398
• Square array A(n,k), n>=0, k>=0, read by antidiagonals, where sequence a_k of column k is the exponential transform of C(n,k).at n=76A145460