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congruent n.  and  practical n.

First numbers that belong to both sets:

6, 20, 24, 28, 30, 54, 56, 60, 78, 80, 84, 88, 96, 112, 120, 126, 150, 156, 180, 198, 208, 210, 216, 220, 224, 240, 252, 260, 270, 276, 280, 294, 306, 308, 312, 320, 330, 336, 340, 342, 348, 352, 368, 380, 384, 390, 408, 414, 440, 448, 462, 464, 468, 476, 480, 486, 496, 500, 504, 510, 532, 540, 544, 546, 552, 558, 580, 600, 608, 616, 624, 630, 644, 660, 696, 700, 702, 720, 726, 728, 736, 750, 756, 760, 792, 798, 820, 828, 832, 840, 860, 864, 870, 880, 888, 896, 918, 920, 924, 952, 960, 966, 980, 984, 990, 992, 1008, 1014, 1020, 1040, 1044, 1080, 1104, 1110, 1116, 1120, 1122, 1134, 1140, 1144, 1148, 1176, 1204, 1224, 1230, 1232, 1240, 1242, 1248, 1254, 1272, 1280, 1300, 1302, 1320, 1326, 1332, 1344, 1350, 1360, 1368, 1372, 1376, 1386, 1392, 1400, 1404, 1408, 1428, 1464, 1470, 1472, 1476, 1482, 1484, 1488, 1496, 1500, 1504, 1518, 1520, 1536, 1560, 1566, 1590, 1596, 1620, 1624, 1632, 1638, 1640, 1656, 1692, 1710, 1716, 1720, 1736, 1760, 1768, 1770, 1776, 1782, 1792, 1794, 1806, 1820, 1830, 1848, 1856, 1860, 1872, 1880, 1888, 1890, 1904, 1908, 1920, 1944, 1950, 1974, 1976, 1980, 1984, 1998, 2000, 2016, 2040, 2046, 2070, 2072, 2100, 2128, 2130, 2142, 2160, 2176, 2184, 2190, 2196, 2200, 2208, 2214, 2232, 2244, 2256, 2262, 2268, 2288, 2296, 2300, 2310, 2320, 2340, 2360, 2368, 2392, 2400, 2408, 2418, 2420, 2430, 2432, 2436, 2460, 2464, 2478, 2484, 2496, 2520, 2544, 2548, 2550, 2552, 2556, 2574, 2576, 2580, 2604, 2624, 2632, 2640, 2646, 2652, 2680, 2706, 2730, 2744, 2754, 2772, 2784, 2790, 2800, 2808, 2814, 2838, 2840, 2844, 2862, 2880, 2886.

Some larger examples :