A045080 Numbers n with property that in base 4 representation the numbers of 0's and 3's are 3 and 4, respectively.

12351, 12495, 12531, 12540, 13071, 13107, 13116, 13251, 13260, 13296, 15375, 15411, 15420, 15555, 15564, 15600, 16131, 16140, 16176, 16320, 16639, 17215, 17359, 17395, 17404, 19519, 19663, 19699, 19708, 20239