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 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 30 |
| 4 | 5 |
| 5 | 9 |
| 6 | 7 |
| 7 | 50 |
| 8 | 20 |
| 9 | 42 |
| 10 | 11 |
| 11 | 36 |
| 12 | 13 |
| 13 | 6510 |
| 14 | 27 |
| 15 | 54 |
| 16 | 17 |
| 17 | 70620 |
| 18 | 19 |
| 19 | 25 |
| 20 | 46 |
| 21 | 66 |
| 22 | 23 |
| 23 | 168630 |
| 24 | 124 |
| 25 | 98 |
| 26 | 58 |
| 27 | 78 |
| 28 | 29 |