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practical n.  and  Ulam n.

First numbers that belong to both sets:

1, 2, 4, 6, 8, 16, 18, 28, 36, 48, 72, 126, 180, 260, 324, 390, 400, 414, 456, 522, 544, 546, 612, 624, 690, 720, 798, 800, 820, 864, 1020, 1032, 1230, 1296, 1360, 1404, 1428, 1470, 1472, 1536, 1770, 1792, 1836, 1856, 1900, 1944, 1968, 2010, 2112, 2156, 2178, 2288, 2418, 2420, 2464, 2484, 2550, 2552, 2574, 2628, 2660, 2814, 2816, 2916, 3456, 3608, 3630, 3696, 3740, 3762, 3808, 3872, 3952, 3960, 4260, 4368, 4392, 4536, 4600, 4602, 4624, 4644, 4732, 4800, 4900, 4998, 5096, 5184, 5208, 5250, 5382, 5550, 5616, 5768, 5814, 5856, 5880, 5900, 6156, 6420, 6552, 6784, 6804, 6916, 6936, 7038, 7104, 7280, 7300, 7424, 7434, 7476, 7500, 7520, 7600, 7752, 7776, 7820, 7884, 7950, 7952, 8008, 8060, 8096, 8128, 8192, 8250, 8272, 8316, 8370, 8424, 8512, 8514, 8844, 8856, 8964, 9120, 9184, 9240, 9702, 9804, 9870, 10088, 10112, 10220, 10388, 10540, 10584, 10716, 10848, 10872, 11016, 11256, 11280, 11300, 11368, 11388, 11500, 11600, 11622, 11776, 11952, 12060, 12272, 12580, 12600, 12768, 12810, 12876, 12900, 13032, 13132, 13328, 13440, 13572, 13650, 13692, 13760, 13780, 13804, 13936, 14080, 14168, 14190, 14300, 14320, 14322, 14364, 14454, 14476, 14520, 14532, 14586, 14664, 14760, 14796, 14840, 14892, 14904, 14994, 15080, 15138, 15400, 15488, 15510, 15600, 15620, 15642, 15700, 15732, 15744, 15820, 15984, 16240, 16700, 16744, 16912, 17298, 17328, 17430, 17604, 17760, 17780, 17892, 17992, 18432, 18444, 18620, 18684, 18750, 18774, 19072, 19312, 19314, 19600, 19620, 19656, 19698, 20140, 20216, 20480, 20646, 20670, 20736, 20910, 21000, 21560, 21582, 21584, 21736, 21750, 21868, 21870, 22320, 22344, 22356, 22400, 22554, 22816, 22960, 23004, 23028, 23136, 23160, 23226, 23392, 23632, 23634, 23700, 23744, 24240, 24318, 24822, 24888, 25000, 25296, 25340, 25452, 25530, 25560.

Some larger examples :