Search a number
congruent n.  and  lucky n.

First numbers that belong to both sets:

7, 13, 15, 21, 31, 37, 63, 69, 79, 87, 93, 111, 127, 133, 135, 141, 151, 159, 189, 205, 219, 223, 231, 237, 261, 285, 303, 319, 327, 349, 357, 367, 391, 399, 415, 421, 429, 463, 477, 487, 495, 511, 517, 519, 535, 541, 559, 583, 591, 613, 615, 621, 631, 639, 645, 651, 655, 679, 685, 693, 717, 723, 727, 735, 741, 777, 781, 805, 823, 831, 855, 885, 895, 903, 925, 927, 933, 957, 975, 981, 991, 997, 1021, 1023, 1029, 1039, 1053, 1057, 1087, 1093, 1095, 1101, 1105, 1117, 1155, 1167, 1183, 1189, 1197, 1201, 1231, 1233, 1245, 1249, 1261, 1263, 1285, 1303, 1309, 1339, 1357, 1365, 1387, 1389, 1419, 1455, 1471, 1485, 1495, 1501, 1503, 1519, 1533, 1543, 1567, 1575, 1597, 1599, 1639, 1645, 1659, 1663, 1693, 1701, 1705, 1711, 1731, 1749, 1765, 1767, 1773, 1797, 1831, 1839, 1869, 1879, 1893, 1933, 1941, 1959, 1965, 1983, 1995, 2023, 2031, 2053, 2059, 2079, 2085, 2095, 2113, 2125, 2127, 2133, 2173, 2215, 2221, 2239, 2253, 2257, 2271, 2277, 2301, 2311, 2317, 2335, 2343, 2365, 2379, 2407, 2415, 2439, 2445, 2461, 2479, 2493, 2511, 2527, 2557, 2575, 2589, 2599, 2607, 2647, 2653, 2661, 2671, 2725, 2773, 2781, 2797, 2815, 2817, 2821, 2823, 2845, 2877, 2887, 2901, 2943, 2953, 2973, 2983, 3003, 3007, 3031, 3037, 3039, 3055, 3099, 3109, 3111, 3133, 3171, 3175, 3183, 3199, 3213, 3223, 3229, 3261, 3289, 3301, 3325, 3339, 3351, 3355, 3381, 3405, 3409, 3433, 3439, 3453, 3477, 3487, 3495, 3559, 3565, 3595, 3597, 3603, 3607, 3613, 3621, 3625, 3655, 3661, 3663, 3669, 3685, 3687, 3709, 3717, 3727, 3781, 3789, 3847, 3865, 3879, 3909, 3943, 3951, 3975, 3981, 3991, 3999, 4015, 4023, 4033, 4045.

Some larger examples :