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 | 7 |
| 3 | 3 |
| 4 | 113 |
| 5 | 971 |
| 6 | 759 |
| 7 | 12589 |
| 8 | 128481 |
| 9 | 144027 |
| 10 | 1377017 |
| 11 | 15273693 |
| 12 | 24294831 |
| 13 | 146961301 |
| 14 | 1808548329 |
| 15 | 3842160243 |
| 16 | 15148937153 |
| 17 | 213183639237 |
| 18 | 583349245479 |
| 19 | 1481300283709 |
| 20 | 24998687462961 |
| 21 | 86112795218187 |
| 22 | 132385977330377 |