a(n) = 3*a(n-1) - 2*a(n-2) with a(0)=32 and a(1)=80.

Terms

a(0) =32a(1) =80a(2) =176a(3) =368a(4) =752a(5) =1520a(6) =3056a(7) =6128a(8) =12272a(9) =24560a(10) =49136a(11) =98288a(12) =196592a(13) =393200a(14) =786416a(15) =1572848a(16) =3145712a(17) =6291440a(18) =12582896a(19) =25165808a(20) =50331632a(21) =100663280a(22) =201326576a(23) =402653168a(24) =805306352a(25) =1610612720a(26) =3221225456a(27) =6442450928a(28) =12884901872a(29) =25769803760