a(n+1) = Sum_{k=0..floor(3*n/5)} a(k) * a(n-k).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =13a(7) =26a(8) =57a(9) =117a(10) =262a(11) =602a(12) =1329a(13) =3079a(14) =6903a(15) =16161a(16) =38185a(17) =87745a(18) =207896a(19) =481817a(20) =1148246a(21) =2755781a(22) =6485489a(23) =15592656a(24) =36899080a(25) =88966356a(26) =215687474a(27) =515590781a(28) =1251629165a(29) =2998835401