Search a number
aban n.  and  Ulam n.

First numbers that belong to both sets:

1, 2, 3, 4, 6, 8, 11, 13, 16, 18, 26, 28, 36, 38, 47, 48, 53, 57, 62, 69, 72, 77, 82, 87, 97, 99, 102, 106, 114, 126, 131, 138, 145, 148, 155, 175, 177, 180, 182, 189, 197, 206, 209, 219, 221, 236, 238, 241, 243, 253, 258, 260, 273, 282, 309, 316, 319, 324, 339, 341, 356, 358, 363, 370, 382, 390, 400, 402, 409, 412, 414, 429, 431, 434, 441, 451, 456, 483, 485, 497, 502, 522, 524, 544, 546, 566, 568, 585, 602, 605, 607, 612, 624, 627, 646, 668, 673, 685, 688, 690, 695, 720, 722, 732, 734, 739, 751, 781, 783, 798, 800, 820, 847, 849, 861, 864, 866, 891, 893, 905, 927, 949, 983, 986, 991, 1000000, 1000002, 1000022, 1000024, 1000063, 1000107, 1000115, 1000117, 1000132, 1000134, 1000137, 1000139, 1000154, 1000156, 1000159, 1000161, 1000176, 1000178, 1000195, 1000198, 1000200, 1000217, 1000220, 1000222, 1000239, 1000261, 1000278, 1000281, 1000283, 1000322, 1000347, 1000349, 1000369, 1000371, 1000374, 1000376, 1000388, 1000432, 1000454, 1000479, 1000481, 1000498, 1000523, 1000525, 1000545, 1000547, 1000567, 1000569, 1000603, 1000606, 1000608, 1000625, 1000628, 1000630, 1000650, 1000652, 1000669, 1000694, 1000696, 1000713, 1000738, 1000740, 1000760, 1000762, 1000782, 1000784, 1000906, 1000909, 1000911, 1000936, 1000938, 1000953, 1000955, 1000972, 2000003, 2000025, 2000050, 2000052, 2000094, 2000096, 2000108, 2000111, 2000113, 2000130, 2000133, 2000135, 2000155, 2000157, 2000199, 2000201, 2000262, 2000265, 2000267, 2000309, 2000311, 2000331, 2000333, 2000345, 2000348, 2000350, 2000389, 2000411, 2000436, 2000438, 2000463, 2000465, 2000480, 2000482, 2000499, 2000502, 2000504, 2000546, 2000548, 2000560, 2000563, 2000607, 2000609, 2000612, 2000614, 2000629, 2000631, 2000634, 2000636, 2000656, 2000658, 2000692, 2000695, 2000697, 2000714, 2000717, 2000719, 2000739, 2000741, 2000758, 2000783, 2000785, 2000797, 2000800, 2000827, 2000829, 2000844, 2000846, 2000849, 2000851, 2000866, 2000868, 2000871, 2000873, 2000893, 2000895, 2000937, 2000939, 3000026, 3000029, 3000031.

Some larger examples :