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 | 30 |
| 2 | 42 |
| 3 | 792 |
| 4 | 1002 |
| 5 | 2436 |
| 6 | 5604 |
| 7 | 37338 |
| 8 | 105558 |
| 9 | 614154 |
| 10 | 4087968 |
| 11 | 8118264 |
| 12 | 15796476 |
| 13 | 133230930 |
| 14 | 384276336 |
| 15 | 2841940500 |
| 16 | 3163127352 |
| 17 | 4835271870 |
| 18 | 7346629512 |
| 19 | 18440293320 |
| 20 | 30388671978 |
| 21 | 45060624582 |
| 22 | 107438159466 |
| 23 | 142798995930 |
| 24 | 684957390936 |
| 25 | 1820701100652 |