Search a number
alternating n.  and  oban n.

First numbers that belong to both sets:

3, 5, 6, 7, 8, 9, 10, 12, 16, 18, 23, 25, 27, 29, 30, 36, 38, 50, 56, 58, 63, 65, 67, 69, 70, 76, 78, 83, 85, 87, 89, 90, 96, 98, 303, 305, 307, 309, 323, 325, 327, 329, 363, 365, 367, 369, 383, 385, 387, 389, 503, 505, 507, 509, 523, 525, 527, 529, 563, 565, 567, 569, 583, 585, 587, 589, 610, 612, 616, 618, 630, 636, 638, 650, 656, 658, 670, 676, 678, 690, 696, 698, 703, 705, 707, 709, 723, 725, 727, 729, 763, 765, 767, 769, 783, 785, 787, 789, 810, 812, 816, 818, 830, 836, 838, 850, 856, 858, 870, 876, 878, 890, 896, 898, 903, 905, 907, 909, 923, 925, 927, 929, 963, 965, 967, 969, 983, 985, 987, 989.