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) |
|---|---|
| 3 | 23 |
| 4 | 53 |
| 5 | 449 |
| 6 | 191 |
| 7 | 1171 |
| 8 | 30671 |
| 9 | 5827 |
| 10 | 3733 |
| 11 | 901687 |
| 12 | 10357 |
| 13 | 834469 |
| 14 | 3043427 |
| 15 | 5430889 |
| 16 | 4060019 |
| 17 | 498061 |
| 18 | 34763 |
| 19 | 118248433 |
| 20 | 62344463 |
| 21 | 218555173 |
| 22 | 4463351 |
| 23 | 114607657 |
| 24 | 7903613 |
| 25 | 14523874693 |
| 26 | 211675817 |
| 27 | 32814697 |
| 28 | 93375223 |
| 29 | 162466979 |
| 30 | 8052409793 |
| 31 | 12006877873 |