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ABA n.  and  tau n.

First numbers that belong to both sets:

8, 18, 24, 72, 128, 288, 384, 450, 882, 896, 1152, 1250, 1800, 2178, 3042, 3528, 4050, 5000, 5202, 6498, 8712, 9522, 11250, 12168, 13122, 15138, 16200, 17298, 18432, 20808, 24642, 25992, 26244, 28800, 30258, 32768, 33282, 38088, 38880, 39762, 45000, 50562, 52488, 56448, 60552, 62658, 64800, 65856, 66978, 69192, 71442, 80000, 80802, 90738, 95922, 98304, 98568, 101250, 112338, 115200, 121032, 124002, 133128, 139392, 142578, 159048, 163840, 169362, 180000, 183618, 190962, 192000, 194688, 198450, 202248, 202500, 206082, 209952, 213858, 229376, 229842, 235298, 250632, 259200, 267912, 279936, 285768, 290322, 294912, 308898, 320000, 323208, 328050, 332928, 337842, 347778, 362952, 383688, 399618, 405000, 410418, 415872, 443682, 449352, 478242, 490050, 491520, 496008, 502002, 538722, 551250, 570312, 576738, 589698, 609408, 642978, 656658, 670482, 677448, 684450, 698562, 712818, 720000, 734472, 763848, 793800, 801378, 824328, 839808, 855432, 895122, 919368, 927522, 941192, 943938, 968832, 977202, 1028178, 1036800, 1045458, 1080450, 1107072, 1134018, 1143072, 1161288, 1170450, 1188882, 1235592, 1245042, 1302498, 1312200, 1321938, 1351368, 1361250, 1381122, 1391112, 1421298, 1441602, 1462050, 1545282, 1577088, 1587762, 1598472, 1620000, 1641672, 1696482, 1740978, 1763442, 1774728, 1786050, 1808802, 1901250, 1912968, 1936512, 1959552, 1960200, 1972098, 2008008, 2044242, 2117682, 2130048, 2142450, 2154888, 2167362, 2192418, 2205000, 2217618, 2242962, 2306952, 2319858, 2358792, 2424402, 2504322, 2544768, 2571912, 2585538, 2626632, 2640402, 2681928, 2723778, 2737800, 2794248, 2823576, 2836962, 2851272, 2880000, 2894418, 3001250, 3011058, 3160098, 3175200, 3190338, 3205512, 3235968, 3251250, 3343698, 3374802, 3406050, 3468978, 3532482, 3580488, 3612672, 3628818, 3710088, 3759282, 3775752, 3792258, 3825378, 3858642, 3892050, 3908808, 3925602, 4010112, 4061250, 4112712, 4129938, 4147200, 4181832, 4269042, 4286592, 4321800, 4339458, 4482018, 4536072, 4554162, 4572288, 4663458, 4681800, 4737042, 4755528, 4885938, 4923522, 4961250, 4980168, 5171328, 5184000, 5209992, 5248800, 5268258, 5287752, 5385762, 5445000, 5524488, 5544450, 5584482, 5685192, 5705442, 5766408, 5807232, 5827698, 5848200, 5868738, 5951250, 5992722, 6139008, 6181128, 6202242, 6329682, 6351048, 6458418.

Some larger examples :