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 | 0 |
| 2 | 1 |
| 3 | 94 |
| 4 | 1758 |
| 5 | 13698 |
| 6 | 70539 |
| 7 | 266320 |
| 8 | 837060 |
| 9 | 2260984 |
| 10 | 5460657 |
| 11 | 12046294 |
| 12 | 24775158 |
| 13 | 47847538 |
| 14 | 87967579 |
| 15 | 154764912 |
| 16 | 262110940 |
| 17 | 429480216 |
| 18 | 684015621 |
| 19 | 1061192670 |
| 20 | 1609449754 |
| 21 | 2390049498 |
| 22 | 3483126407 |