a(n) = n*2^(n-4).

Terms

a(0) =4a(1) =10a(2) =24a(3) =56a(4) =128a(5) =288a(6) =640a(7) =1408a(8) =3072a(9) =6656a(10) =14336a(11) =30720a(12) =65536a(13) =139264a(14) =294912a(15) =622592a(16) =1310720a(17) =2752512a(18) =5767168a(19) =12058624a(20) =25165824a(21) =52428800a(22) =109051904a(23) =226492416a(24) =469762048a(25) =973078528a(26) =2013265920a(27) =4160749568a(28) =8589934592a(29) =17716740096