Search a number
alternating n.  and  Curzon n.

First numbers that belong to both sets:

1, 2, 5, 6, 9, 14, 18, 21, 29, 30, 41, 50, 54, 65, 69, 74, 78, 81, 89, 90, 98, 105, 125, 141, 165, 189, 210, 230, 254, 270, 278, 309, 321, 329, 341, 345, 369, 410, 414, 438, 470, 498, 509, 525, 545, 561, 581, 585, 614, 618, 638, 650, 690, 725, 729, 741, 749, 761, 765, 785, 789, 810, 818, 834, 854, 870, 894, 905, 965, 989, 1014, 1034, 1070, 1218, 1238, 1274, 1278, 1418, 1430, 1454, 1458, 1478, 1610, 1614, 1638, 1650, 1694, 1818, 1838, 1850, 1854, 1898, 2105, 2109, 2121, 2129, 2141, 2169, 2181, 2301, 2321, 2325, 2345, 2361, 2501, 2505, 2525, 2529, 2549, 2585, 2589, 2709, 2721, 2741, 2765, 2781, 2921, 2925, 2961, 2969, 3014, 3018, 3050, 3098, 3210, 3234, 3290, 3414, 3434, 3458, 3474, 3498, 3614, 3618, 3654, 3674, 3810, 3834, 3858, 3870, 3878, 3894, 4109, 4121, 4145, 4181, 4349, 4365, 4389, 4505, 4521, 4529, 4545, 4701, 4709, 4745, 4769, 4901, 4905, 4925, 4929, 4941, 4961, 4965, 5018, 5030, 5034, 5070, 5090, 5214, 5238, 5250, 5294, 5298, 5418, 5430, 5454, 5474, 5478, 5630, 5658, 5810, 5838, 5850, 5858, 5894, 6101, 6105, 6125, 6161, 6189, 6305, 6309, 6329, 6369, 6381, 6501, 6521, 6549, 6581, 6585, 6705, 6725, 6749, 6761, 6929, 6941, 6965, 6981, 7014, 7074, 7098, 7218, 7230, 7274, 7278, 7410, 7434, 7478, 7634, 7638, 7674, 7814, 7830, 7874, 7898, 8169, 8181, 8301, 8309, 8325, 8345, 8349, 8381, 8505, 8549, 8561, 8709, 8721, 8741, 8745, 8769, 8789, 8925, 8945, 8961, 8969, 8985, 9030, 9038, 9074, 9090, 9230, 9258, 9270, 9434, 9458, 9618, 9650, 9654, 9690, 9830, 9854, 9858, 10109, 10161, 10305, 10365, 10385, 10505, 10509, 10529, 10569, 10581, 10589, 10709, 10745, 10749, 10761, 10781.

Some larger examples :