a(n) = 2*a(n-1) - 5*a(n-2), with a(1) = -1, a(2) = -7.

Terms

a(0) =-1a(1) =-7a(2) =-9a(3) =17a(4) =79a(5) =73a(6) =-249a(7) =-863a(8) =-481a(9) =3353a(10) =9111a(11) =1457a(12) =-42641a(13) =-92567a(14) =28071a(15) =518977a(16) =897599a(17) =-799687a(18) =-6087369a(19) =-8176303a(20) =14084239a(21) =69049993a(22) =67678791a(23) =-209892383a(24) =-758178721a(25) =-466895527a(26) =2857102551a(27) =8048682737a(28) =1811852719a(29) =-36619708247