List of quadruples: 2*(-4)^n, -3*(-4)^n, 2*(-4^n), 2*(-4)^n, n >= 0.

Terms

a(0) =2a(1) =-3a(2) =2a(3) =2a(4) =-8a(5) =12a(6) =-8a(7) =-8a(8) =32a(9) =-48a(10) =32a(11) =32a(12) =-128a(13) =192a(14) =-128a(15) =-128a(16) =512a(17) =-768a(18) =512a(19) =512a(20) =-2048a(21) =3072a(22) =-2048a(23) =-2048a(24) =8192a(25) =-12288a(26) =8192a(27) =8192a(28) =-32768a(29) =49152