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 | 31 |
| 2 | 271 |
| 3 | 1281 |
| 4 | 4251 |
| 5 | 11253 |
| 6 | 25493 |
| 7 | 51563 |
| 8 | 95693 |
| 9 | 166003 |
| 10 | 272755 |
| 11 | 428605 |
| 12 | 648855 |
| 13 | 951705 |
| 14 | 1358505 |
| 15 | 1894007 |
| 16 | 2586617 |
| 17 | 3468647 |
| 18 | 4576567 |
| 19 | 5951257 |
| 20 | 7638259 |
| 21 | 9688029 |
| 22 | 12156189 |
| 23 | 15103779 |
| 24 | 18597509 |