A032939 Numbers n such that base 4 representation Sum{d(i)*4^i: i=0,1,...,m} has d(i)=0 for all odd i.

1, 2, 3, 4, 8, 12, 16, 17, 18, 19, 32, 33, 34, 35, 48, 49, 50, 51, 64, 68, 72, 76, 128, 132, 136, 140, 192, 196, 200, 204, 256, 257, 258, 259, 272, 273, 274, 275, 288, 289, 290, 291, 304, 305, 306, 307, 512, 513, 514, 515, 528, 529