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 | 1 |
| 2 | 6 |
| 3 | 5 |
| 4 | 7 |
| 5 | 143 |
| 6 | 323 |
| 7 | 23 |
| 8 | 899 |
| 9 | 65231 |
| 10 | 2491 |
| 11 | 3599 |
| 12 | 347261 |
| 13 | 583573 |
| 14 | 1009091 |
| 15 | 1317919 |
| 16 | 16637 |
| 17 | 428448457 |
| 18 | 4273697 |
| 19 | 5605027 |
| 20 | 1445140189 |
| 21 | 2445956099 |
| 22 | 3368562317 |
| 23 | 4927316309 |
| 24 | 6454166203 |
| 25 | 9473323417 |
| 26 | 13508676341 |
| 27 | 17347785757 |
| 28 | 8989229423381 |