a(n) = 32*(2^n - 1).

Terms

a(0) =0a(1) =32a(2) =96a(3) =224a(4) =480a(5) =992a(6) =2016a(7) =4064a(8) =8160a(9) =16352a(10) =32736a(11) =65504a(12) =131040a(13) =262112a(14) =524256a(15) =1048544a(16) =2097120a(17) =4194272a(18) =8388576a(19) =16777184a(20) =33554400a(21) =67108832a(22) =134217696a(23) =268435424a(24) =536870880a(25) =1073741792a(26) =2147483616a(27) =4294967264a(28) =8589934560a(29) =17179869152