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

Terms

a(0) =-1a(1) =0a(2) =1a(3) =0a(4) =-2a(5) =-1a(6) =3a(7) =3a(8) =-4a(9) =-7a(10) =4a(11) =14a(12) =-1a(13) =-25a(14) =-9a(15) =40a(16) =33a(17) =-56a(18) =-82a(19) =63a(20) =171a(21) =-37a(22) =-316a(23) =-71a(24) =524a(25) =350a(26) =-769a(27) =-945a(28) =943a(29) =2064