A039083 Numbers n such that representation in base 9 has same number of 0's and 7's.

1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 14, 15, 17, 19, 20, 21, 22, 23, 24, 26, 28, 29, 30, 31, 32, 33, 35, 37, 38, 39, 40, 41, 42, 44, 46, 47, 48, 49, 50, 51, 53, 55, 56, 57, 58, 59, 60, 62, 63, 73, 74, 75, 76, 77, 78, 80, 88, 91, 92, 93, 94, 95, 96, 98, 100, 101, 102, 103