A165789 a(n) = the smallest positive integer k that when written in binary, and leading 0's of k are ignored, contains the reversal of the digits of binary n.

1, 5, 3, 9, 5, 11, 7, 17, 9, 21, 13, 19, 11, 23, 15, 33, 17, 41, 25, 37, 21, 45, 29, 35, 19, 43, 27, 39, 23, 47, 31, 65, 33, 81, 49, 73, 41, 89, 57, 69, 37, 85, 53, 77, 45, 93, 61, 67, 35, 83, 51, 75, 43, 91, 59, 71, 39, 87, 55, 79, 47, 95, 63, 129, 65, 161, 97, 145, 81, 177, 113