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 | 17 |
| 2 | 21 |
| 3 | 25 |
| 4 | 42 |
| 5 | 63 |
| 6 | 84 |
| 7 | 143 |
| 8 | 286 |
| 9 | 2355 |
| 10 | 5821 |
| 11 | 6618 |
| 12 | 11709 |
| 13 | 12482 |
| 14 | 33747 |
| 15 | 39571 |
| 16 | 129109 |
| 17 | 466957 |
| 18 | 1162248 |
| 19 | 1565166 |
| 20 | 1968084 |
| 21 | 3636638 |
| 22 | 3853951 |
| 23 | 4898376 |
| 24 | 6065280 |
| 25 | 13443745 |
| 26 | 13933175 |
| 27 | 17118698 |
| 28 | 22421197 |
| 29 | 24153462377 |