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

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =2a(8) =1a(9) =1a(10) =3a(11) =3a(12) =2a(13) =4a(14) =6a(15) =5a(16) =6a(17) =10a(18) =11a(19) =11a(20) =16a(21) =21a(22) =22a(23) =27a(24) =37a(25) =43a(26) =49a(27) =64a(28) =80a(29) =92