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) |
|---|---|
| 2 | 3 |
| 3 | 4 |
| 4 | 22 |
| 5 | 31 |
| 6 | 43 |
| 7 | 122 |
| 8 | 506 |
| 9 | 506 |
| 10 | 1187 |
| 11 | 3199 |
| 12 | 11663 |
| 13 | 18773 |
| 14 | 18815 |
| 15 | 32399 |
| 16 | 177216 |
| 17 | 177216 |
| 18 | 177227 |
| 19 | 5225284 |
| 20 | 5225284 |
| 21 | 14295600 |
| 22 | 21566225 |
| 23 | 36572552 |
| 24 | 107730081 |
| 25 | 107832239 |
| 26 | 952416000 |
| 27 | 2293096006 |
| 28 | 5587865542 |
| 29 | 6587515515 |
| 30 | 30174888567 |
| 31 | 30174888567 |
| 32 | 107824082399 |