238046

Appears in sequences

• a(n) = Sum_{k=0..n} binomial(n,k)*w(k)*w(n-k) where w() = A000296().at n=10A194689
• Square array T(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of e.g.f. exp(2 * (exp(x) - Sum_{j=0..k} x^j/j!)).at n=76A336345