Sums of 2 distinct powers of 4.

Terms

a(0) =5a(1) =17a(2) =20a(3) =65a(4) =68a(5) =80a(6) =257a(7) =260a(8) =272a(9) =320a(10) =1025a(11) =1028a(12) =1040a(13) =1088a(14) =1280a(15) =4097a(16) =4100a(17) =4112a(18) =4160a(19) =4352a(20) =5120a(21) =16385a(22) =16388a(23) =16400a(24) =16448a(25) =16640a(26) =17408a(27) =20480a(28) =65537a(29) =65540