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 | 7 |
| 3 | 67 |
| 4 | 661 |
| 5 | 6541 |
| 6 | 64747 |
| 7 | 640927 |
| 8 | 6344521 |
| 9 | 62804281 |
| 10 | 621698287 |
| 11 | 6154178587 |
| 12 | 60920087581 |
| 13 | 603046697221 |
| 14 | 5969546884627 |
| 15 | 59092422149047 |
| 16 | 584954674605841 |
| 17 | 5790454323909361 |
| 18 | 57319588564487767 |
| 19 | 567405431320968307 |
| 20 | 5616734724645195301 |
| 21 | 55599941815130984701 |