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

Terms

a(0) =3a(1) =-1a(2) =-3a(3) =8a(4) =-3a(5) =-16a(6) =30a(7) =-1a(8) =-75a(9) =107a(10) =42a(11) =-331a(12) =354a(13) =350a(14) =-1389a(15) =1043a(16) =2085a(17) =-5560a(18) =2433a(19) =10772a(20) =-21198a(21) =2087a(22) =51081a(23) =-76453a(24) =-23622a(25) =227609a(26) =-256818a(27) =-222022a(28) =963267a(29) =-776041