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) |
|---|---|
| 4 | 14 |
| 5 | 386 |
| 6 | 5868 |
| 7 | 65954 |
| 8 | 614404 |
| 9 | 5030004 |
| 10 | 37460376 |
| 11 | 259477218 |
| 12 | 1697186964 |
| 13 | 10596579708 |
| 14 | 63663115880 |
| 15 | 370293754740 |
| 16 | 2095108370600 |
| 17 | 11574690111400 |
| 18 | 62629794691632 |
| 19 | 332742342741090 |
| 20 | 1739371969822260 |
| 21 | 8961709528660140 |
| 22 | 45576855706440520 |
| 23 | 229087231033907708 |