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 | 30030 |
| 2 | 255255 |
| 3 | 1616615 |
| 4 | 7436429 |
| 5 | 30808063 |
| 6 | 86822723 |
| 7 | 247110827 |
| 8 | 595973171 |
| 9 | 1348781387 |
| 10 | 2756205443 |
| 11 | 5037203051 |
| 12 | 9586934839 |
| 13 | 15805487167 |
| 14 | 25828479029 |
| 15 | 42647023513 |
| 16 | 66238993967 |
| 17 | 98733594781 |
| 18 | 138896412997 |
| 19 | 202652143553 |