a(n) = 17*2^n.

Terms

a(0) =17a(1) =34a(2) =68a(3) =136a(4) =272a(5) =544a(6) =1088a(7) =2176a(8) =4352a(9) =8704a(10) =17408a(11) =34816a(12) =69632a(13) =139264a(14) =278528a(15) =557056a(16) =1114112a(17) =2228224a(18) =4456448a(19) =8912896a(20) =17825792a(21) =35651584a(22) =71303168a(23) =142606336a(24) =285212672a(25) =570425344a(26) =1140850688a(27) =2281701376a(28) =4563402752a(29) =9126805504