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arithmetic n.  and  iban n.

First numbers that belong to both sets:

1, 3, 7, 11, 14, 17, 20, 21, 22, 23, 27, 41, 42, 43, 44, 47, 70, 71, 73, 77, 101, 102, 103, 107, 110, 111, 114, 123, 127, 140, 141, 142, 143, 147, 173, 174, 177, 201, 203, 204, 207, 210, 211, 212, 214, 217, 220, 221, 222, 223, 224, 227, 241, 247, 270, 271, 273, 277, 301, 302, 303, 304, 307, 310, 311, 317, 321, 322, 323, 327, 340, 341, 342, 343, 347, 371, 373, 374, 377, 401, 402, 403, 404, 407, 411, 414, 417, 420, 421, 422, 423, 427, 443, 447, 470, 471, 473, 474, 477, 701, 702, 703, 707, 710, 714, 717, 721, 723, 727, 740, 741, 742, 743, 744, 747, 770, 771, 773, 774, 777, 1001, 1002, 1003, 1004, 1007, 1011, 1012, 1014, 1017, 1020, 1021, 1022, 1023, 1027, 1041, 1043, 1047, 1070, 1071, 1073, 1074, 1077, 1101, 1102, 1103, 1107, 1110, 1111, 1117, 1120, 1121, 1122, 1123, 1124, 1127, 1140, 1141, 1142, 1147, 1171, 1172, 1173, 1174, 1177, 1201, 1203, 1207, 1211, 1212, 1214, 1217, 1220, 1221, 1222, 1223, 1227, 1240, 1241, 1242, 1243, 1244, 1247, 1270, 1271, 1273, 1277, 1301, 1302, 1303, 1307, 1310, 1311, 1317, 1320, 1321, 1323, 1327, 1340, 1341, 1342, 1343, 1347, 1371, 1373, 1374, 1400, 1401, 1403, 1407, 1410, 1411, 1412, 1414, 1417, 1420, 1421, 1422, 1423, 1424, 1427, 1441, 1442, 1443, 1447, 1470, 1471, 1473, 1474, 1477, 1700, 1702, 1703, 1704, 1707, 1710, 1711, 1717, 1721, 1722, 1723, 1724, 1727, 1740, 1741, 1742, 1743, 1744, 1747, 1770, 1771, 1772, 1773, 1774, 1777, 2001, 2002, 2003, 2004, 2010, 2011, 2012, 2014, 2017, 2020, 2021, 2022, 2024, 2027, 2041, 2043, 2047, 2070, 2071, 2072, 2073, 2077, 2101, 2102, 2103, 2104.

Some larger examples :