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

Terms

a(0) =4a(1) =0a(2) =0a(3) =3a(4) =4a(5) =0a(6) =3a(7) =7a(8) =4a(9) =3a(10) =10a(11) =11a(12) =7a(13) =13a(14) =21a(15) =18a(16) =20a(17) =34a(18) =39a(19) =38a(20) =54a(21) =73a(22) =77a(23) =92a(24) =127a(25) =150a(26) =169a(27) =219a(28) =277a(29) =319