a(0) = ... = a(4) = 1; a(n) = Sum_{k=1..n-5} a(k) * a(n-k-5).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =0a(6) =1a(7) =2a(8) =3a(9) =4a(10) =4a(11) =4a(12) =6a(13) =10a(14) =16a(15) =24a(16) =30a(17) =37a(18) =50a(19) =74a(20) =116a(21) =175a(22) =245a(23) =332a(24) =456a(25) =654a(26) =981a(27) =1471a(28) =2146a(29) =3056