一個 
位重複數字是由單個數字重複組成的數字（在給定的基數中，通常以 10 為基數，除非另有說明）。例如，野獸數 666 是一個（十進位制）重位數字。下表給出了基數 
到 10 的前幾個重位數字。
 | OEIS |  位重複數字 |
| 2 | A000225 | 1, 3, 7, 15, 31, 63, 127, ... |
| 3 | A048328 | 1, 2, 4, 8, 13, 26, 40, 80, 121, ... |
| 4 | A048329 | 1, 2, 3, 5, 10, 15, 21, 42, 63, 85, 170, ... |
| 5 | A048330 | 1, 2, 3, 4, 6, 12, 18, 24, 31, 62, 93, 124, 156, ... |
| 6 | A048331 | 1, 2, 3, 4, 5, 7, 14, 21, 28, 35, 43, 86, 129, 172, ... |
| 7 | A048332 | 1, 2, 3, 4, 5, 6, 8, 16, 24, 32, 40, 48, 57, 114, 171, ... |
| 8 | A048333 | 1, 2, 3, 4, 5, 6, 7, 9, 18, 27, 36, 45, 54, 63, 73, 146, ... |
| 9 | A048334 | 1, 2, 3, 4, 5, 6, 7, 8, 10, 20, 30, 40, 50, 60, 70, 80, 91, 182, ... |
| 10 | A010785 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, ... |
如果重位數字的所有數字都是 1，則它被稱為 單位重複數。
