Taipei has 05 and 06 because there used to be 05L, 05R, and 06. 05R is now a taxiway.
LAX runways are 24L, 24R, 25L, and 25R. Since the rules allow only 3 runways with the same number (L, C, & R), 4 parallel runways must use different numbers, usually paired by those closest together. DFW is similar with 17 and 18.