| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 20 |
| 7 | 21 |
| 8 | 22 |
| 9 | 23 |
| 10 | 24 |
| 11 | 25 |
| 12 | 40 |
| 13 | 41 |
| 14 | 42 |
| 15 | 43 |
| 16 | 44 |
| 17 | 45 |
| 18 | 200 |
| 19 | 201 |
| 20 | 202 |
| 21 | 203 |
| 22 | 204 |
| 23 | 205 |
| 24 | 220 |
| 25 | 221 |
| 26 | 222 |
| 27 | 223 |
| 28 | 224 |
| 29 | 225 |
| 30 | 240 |
| 31 | 241 |
| 32 | 242 |
| 33 | 243 |
| 34 | 244 |
| 35 | 245 |
| 36 | 400 |
| 37 | 401 |
| 38 | 402 |
| 39 | 403 |
| 40 | 404 |
| 41 | 405 |
| 42 | 420 |
| 43 | 421 |
| 44 | 422 |
| 45 | 423 |
| 46 | 424 |
| 47 | 425 |
| 48 | 440 |
| 49 | 441 |
| 50 | 442 |
| 51 | 443 |
| 52 | 444 |
| 53 | 445 |
| 54 | 2000 |
| 55 | 2001 |
| 56 | 2002 |
| 57 | 2003 |
[0,1,2,3,4,5,20,21,22,23,24,25,40,41,42,43,44,45, 200,201,202,203,204,205,220,221,222,223,224,225, 240,241,242,243,244,245,400,401,402,403,404,405, 420,421,422,423,424,425,440,441,442,443,444,445, 2000,2001,2002,2003] |