This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 10300 |
| 5 | 10301 |
| 6 | 10302 |
| 7 | 10303 |
| 8 | 10200 |
| 9 | 10201 |
| 10 | 10202 |
| 11 | 10203 |
| 12 | 10100 |
| 13 | 10101 |
| 14 | 10102 |
| 15 | 10103 |
| 16 | 10000 |
| 17 | 10001 |
| 18 | 10002 |
| 19 | 10003 |
| 20 | 20300 |
| 21 | 20301 |
| 22 | 20302 |
| 23 | 20303 |
| 24 | 20200 |
| 25 | 20201 |
| 26 | 20202 |
| 27 | 20203 |
| 28 | 20100 |
| 29 | 20101 |
| 30 | 20102 |
| 31 | 20103 |