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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 12 |
| 6 | 49 |
| 7 | 104 |
| 8 | 625 |
| 9 | 2512 |
| 10 | 15077 |
| 11 | 60358 |
| 12 | 603581 |
| 13 | 2414438 |
| 14 | 28973257 |
| 15 | 173840168 |
| 16 | 1390721397 |
| 17 | 11125773688 |
| 18 | 178012379009 |
| 19 | 1068074289230 |
| 20 | 19225337206141 |
| 21 | 153802697709496 |
| 22 | 1845632372514581 |
| 23 | 18456323725749392 |
| 24 | 406039121966486625 |
| 25 | 3248312975734309938 |