a(n+1)=2a(n)-4a(n-1)+4a(n-2).

Terms

a(0) =0a(1) =1a(2) =-2a(3) =-8a(4) =-4a(5) =16a(6) =16a(7) =-48a(8) =-96a(9) =64a(10) =320a(11) =0a(12) =-1024a(13) =-768a(14) =2560a(15) =4096a(16) =-5120a(17) =-16384a(18) =4096a(19) =53248a(20) =24576a(21) =-147456a(22) =-180224a(23) =327680a(24) =786432a(25) =-458752a(26) =-2752512a(27) =-524288a(28) =8126464a(29) =7340032