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) |
|---|---|
| 1 | 1023 |
| 2 | 10023 |
| 3 | 10113 |
| 4 | 10230 |
| 5 | 10233 |
| 6 | 10323 |
| 7 | 100023 |
| 8 | 100113 |
| 9 | 100230 |
| 10 | 100233 |
| 11 | 100323 |
| 12 | 101130 |
| 13 | 101133 |
| 14 | 101232 |
| 15 | 102300 |
| 16 | 102330 |
| 17 | 102333 |
| 18 | 103230 |
| 19 | 103233 |
| 20 | 103323 |
| 21 | 1000023 |
| 22 | 1000113 |
| 23 | 1000230 |
| 24 | 1000233 |
| 25 | 1000323 |
| 26 | 1001130 |
| 27 | 1001133 |
| 28 | 1001232 |
| 29 | 1002300 |
| 30 | 1002330 |