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oban n.  and  practical n.

First numbers that belong to both sets:

6, 8, 12, 16, 18, 20, 28, 30, 36, 56, 60, 66, 78, 80, 88, 90, 96, 300, 306, 308, 312, 320, 330, 336, 360, 368, 378, 380, 390, 396, 500, 510, 512, 520, 528, 558, 560, 570, 576, 580, 588, 600, 608, 612, 616, 620, 630, 660, 666, 680, 690, 696, 700, 720, 726, 728, 736, 750, 756, 760, 768, 780, 798, 800, 810, 812, 816, 820, 828, 858, 860, 868, 870, 880, 888, 896, 900, 912, 918, 920, 928, 930, 936, 960, 966, 968, 980, 990.