a(n) = a(n-1) + a(n-5); a(0) = ... = a(4) = 1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =3a(7) =4a(8) =5a(9) =6a(10) =8a(11) =11a(12) =15a(13) =20a(14) =26a(15) =34a(16) =45a(17) =60a(18) =80a(19) =106a(20) =140a(21) =185a(22) =245a(23) =325a(24) =431a(25) =571a(26) =756a(27) =1001a(28) =1326a(29) =1757