a(n) = 2*a(n-1) - 2*a(n-2), with a(0)=1, a(1)=5.

Terms

a(0) =1a(1) =5a(2) =8a(3) =6a(4) =-4a(5) =-20a(6) =-32a(7) =-24a(8) =16a(9) =80a(10) =128a(11) =96a(12) =-64a(13) =-320a(14) =-512a(15) =-384a(16) =256a(17) =1280a(18) =2048a(19) =1536a(20) =-1024a(21) =-5120a(22) =-8192a(23) =-6144a(24) =4096a(25) =20480a(26) =32768a(27) =24576a(28) =-16384a(29) =-81920