147140

Appears in sequences

• a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=a(2)=1 and a(3)=4.at n=18A024727
• G.f. A(x) satisfies A(x) = 1 + x + x*(1 + x)^2*A(x)^3.at n=7A366239