属于这两组的第一个数字:
20,42,108,132,176,198,222,288,312,378,400,468,490,558,580,648,714,738,760,804,828,894,918,940,984,1032,1098,1122,1144,1188,1212,1278,1300,1368,1458,1480,1548,1614,1638,1660,1704,1728,1750,1794,1818,1840,1884,1952,1974,2022,2044,2088,2112,2156,2178,2200,2268,2358,2380,2448,2470,2492,2514,2538,2560,2604,2628,2694,2716,2718,2740,2784,2874,2920,2964,3008,3078,3100,3168,3190,3258,3280,3348,3392,3414,3416,3438,3460,3504,3528,3594,3618,3640,3684,3752,3774,3820,3864,3954,3976,4068,4136,4158,4180,4248,4270,4314,4338,4360,4404,4428,4472,4494,4518,4540,4584,4674,4720,4764,4854,4920,4944,5010,5058,5080,5148,5170,5192,5214,5238,5260,5304,5328,5394,5418,5440,5484,5530,5574,5620,5664,5754,5776,5820,5844,5888,5910,5934,6000,6048,6114,6138,6160,6204,6228,6272,6294,6318,6340,6384,6474,6496,6520,6564,6608,6654,6720,6744,6810,6834,6900,6924,6968,6990,7038,7060,7104,7128,7150,7194,7216,7218,7240,7284,7374,7420,7464,7532,7554,7620,7644,7710,7734,7756,7800,7824,7868,7890,7912,7936,7980,8028,8050,8094,8118,8140,8184,8274,8296,8320,8364,8432,8454,8520,8544,8610,8634,8700,8724,8790,8880,8970,9040,9084,9152,9174,9196,9220,9264,9354,9420,9444,9510,9534,9600,9624,9690,9780,9870,9960,10032,10098,10122,10188,10212,10278,10300,10368,10458,10480,10548,10570,10614,10638,10660,10704,10728,10794,10816,10818,10840,10884,10974,11022,11088,11112,11178,11200,11268,11312,11336,11358,11380,11448,11492,11514,11538,11560,11604,11628. 一些较大的示例:
49998990,49999012,49999060,49999104,49999194,49999284,49999350,49999352,49999374,49999440,49999464,49999530,49999554,49999576,49999620,49999710,49999800,49999890,49999956,49999980.