a(n) = a(n-1) + a(n-3) + a(n-5).

Terms

a(0) =-3a(1) =-1a(2) =4a(3) =8a(4) =15a(5) =16a(6) =23a(7) =42a(8) =66a(9) =104a(10) =162a(11) =251a(12) =397a(13) =625a(14) =980a(15) =1539a(16) =2415a(17) =3792a(18) =5956a(19) =9351a(20) =14682a(21) =23053a(22) =36196a(23) =56834a(24) =89238a(25) =140116a(26) =220003a(27) =345437a(28) =542387a(29) =851628