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

Terms

a(0) =1a(1) =-4a(2) =6a(3) =-4a(4) =-4a(5) =16a(6) =-24a(7) =16a(8) =16a(9) =-64a(10) =96a(11) =-64a(12) =-64a(13) =256a(14) =-384a(15) =256a(16) =256a(17) =-1024a(18) =1536a(19) =-1024a(20) =-1024a(21) =4096a(22) =-6144a(23) =4096a(24) =4096a(25) =-16384a(26) =24576a(27) =-16384a(28) =-16384a(29) =65536