a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4) - a(n-5) with a(0)=0, a(1)=1, a(2)=2, a(3)=3 and a(4)=4.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =10a(6) =18a(7) =33a(8) =62a(9) =119a(10) =222a(11) =418a(12) =788a(13) =1485a(14) =2794a(15) =5263a(16) =9912a(17) =18666a(18) =35150a(19) =66197a(20) =124662a(21) =234763a(22) =442106a(23) =832578a(24) =1567912a(25) =2952697a(26) =5560530a(27) =10471611a(28) =19720172a(29) =37137098