A linear recurrence sequence: a(n) = a(n-1) + a(n-3) + a(n-5) + a(n-6).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =4a(7) =7a(8) =10a(9) =16a(10) =25a(11) =40a(12) =67a(13) =109a(14) =175a(15) =283a(16) =457a(17) =739a(18) =1198a(19) =1939a(20) =3136a(21) =5074a(22) =8209a(23) =13282a(24) =21493a(25) =34777a(26) =56269a(27) =91045a(28) =147313a(29) =238357