193641

Appears in sequences

• E.g.f. satisfies: A'(x) = (1 + x*A(x))*(1 + 2*x*A(x)).at n=8A233537
• a(n) = a(n-1) + a(n-2) - n*a(floor(n/2)), where a(0) = 1, a(1) = 1, a(2) = 1.at n=25A298400