A031489 n-th number k which in base 8 has 2 more 0's than 7's.

64, 128, 192, 256, 320, 384, 513, 514, 515, 516, 517, 518, 520, 528, 536, 544, 552, 560, 576, 640, 704, 768, 832, 896, 1025, 1026, 1027, 1028, 1029, 1030, 1032, 1040, 1048, 1056, 1064, 1072, 1088