218045

Appears in sequences

• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 4.at n=15A025266
• a(n) = 1 + Sum_{k=0..n-2} binomial(n-2,k) * a(k).at n=13A337186