18987930

Appears in sequences

• Generalized Catalan Numbers x^3*A(x)^2 + (x-1)*A(x) + 1 =0.at n=25A023431
• a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 0, 1, 1.at n=27A025246