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 | 11 |
| 2 | 251 |
| 3 | 1291 |
| 4 | 4091 |
| 5 | 20731 |
| 6 | 104971 |
| 7 | 1048571 |
| 8 | 2085131 |
| 9 | 9834491 |
| 10 | 11316491 |
| 11 | 14776331 |
| 12 | 18974731 |
| 13 | 29986571 |
| 14 | 49787131 |
| 15 | 78074891 |
| 16 | 168896011 |
| 17 | 236421371 |
| 18 | 406586891 |
| 19 | 429981691 |
| 20 | 454371851 |
| 21 | 479785211 |
| 22 | 959512571 |
| 23 | 1146228731 |