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 | 1 |
| 2 | 3 |
| 3 | 17 |
| 4 | 43 |
| 5 | 237 |
| 6 | 599 |
| 7 | 3301 |
| 8 | 8343 |
| 9 | 45977 |
| 10 | 116203 |
| 11 | 640377 |
| 12 | 1618499 |
| 13 | 8919301 |
| 14 | 22542783 |
| 15 | 124229837 |
| 16 | 313980463 |
| 17 | 1730298417 |
| 18 | 4373183699 |
| 19 | 24099948001 |
| 20 | 60910591323 |
| 21 | 335668973597 |
| 22 | 848375094823 |
| 23 | 4675265682357 |
| 24 | 11816340736199 |