Sums of two powers of 8.

Terms

a(0) =2a(1) =9a(2) =16a(3) =65a(4) =72a(5) =128a(6) =513a(7) =520a(8) =576a(9) =1024a(10) =4097a(11) =4104a(12) =4160a(13) =4608a(14) =8192a(15) =32769a(16) =32776a(17) =32832a(18) =33280a(19) =36864a(20) =65536a(21) =262145a(22) =262152a(23) =262208a(24) =262656a(25) =266240a(26) =294912a(27) =524288a(28) =2097153a(29) =2097160