a(n) = a(n-1) + a(n-2) - a(n-3) + a(n-5).

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =1a(5) =0a(6) =1a(7) =1a(8) =2a(9) =3a(10) =4a(11) =6a(12) =8a(13) =12a(14) =17a(15) =25a(16) =36a(17) =52a(18) =75a(19) =108a(20) =156a(21) =225a(22) =325a(23) =469a(24) =677a(25) =977a(26) =1410a(27) =2035a(28) =2937a(29) =4239