3620550domain: NAppears in sequencesa(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)=3.at n=24A024725Number of ways to choose a strict rooted partition of each part in a rooted partition of n.at n=36A301753