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 | 35 |
| 2 | 1225 |
| 3 | 4861 |
| 4 | 23276 |
| 5 | 160652 |
| 6 | 738515 |
| 7 | 3275898 |
| 8 | 16648464 |
| 9 | 77299468 |
| 10 | 346860730 |
| 11 | 1628437829 |
| 12 | 7520074031 |
| 13 | 34197531024 |
| 14 | 157677790883 |
| 15 | 726171154807 |
| 16 | 3326887874211 |
| 17 | 15303816884989 |
| 18 | 70464546420156 |
| 19 | 323991903658548 |