80530domain: NAppears in sequencesa(n) = Sum_{i=1..floor((n+2)/4)} a(2i-1)*a(n-2i+1), with a(1)=a(2)=1 and a(3)=5.at n=15A024951Number of objects generated by the Combstruct grammar defined in the Maple program. See the link for the grammar specification.at n=10A052884