a(n) = -a(n-2) - a(n-3).

Terms

a(0) =-3a(1) =0a(2) =2a(3) =3a(4) =-2a(5) =-5a(6) =-1a(7) =7a(8) =6a(9) =-6a(10) =-13a(11) =0a(12) =19a(13) =13a(14) =-19a(15) =-32a(16) =6a(17) =51a(18) =26a(19) =-57a(20) =-77a(21) =31a(22) =134a(23) =46a(24) =-165a(25) =-180a(26) =119a(27) =345a(28) =61a(29) =-464