a(n) = 3*a(n-1) - 4*a(n-2) with a(0) = a(1) = 1.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =-7a(4) =-17a(5) =-23a(6) =-1a(7) =89a(8) =271a(9) =457a(10) =287a(11) =-967a(12) =-4049a(13) =-8279a(14) =-8641a(15) =7193a(16) =56143a(17) =139657a(18) =194399a(19) =24569a(20) =-703889a(21) =-2209943a(22) =-3814273a(23) =-2603047a(24) =7447951a(25) =32756041a(26) =68476319a(27) =74404793a(28) =-50690897a(29) =-449691863