Sums of two distinct powers of 2.

Terms

a(0) =3a(1) =5a(2) =6a(3) =9a(4) =10a(5) =12a(6) =17a(7) =18a(8) =20a(9) =24a(10) =33a(11) =34a(12) =36a(13) =40a(14) =48a(15) =65a(16) =66a(17) =68a(18) =72a(19) =80a(20) =96a(21) =129a(22) =130a(23) =132a(24) =136a(25) =144a(26) =160a(27) =192a(28) =257a(29) =258