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) |
|---|---|
| 0 | 9 |
| 1 | 10 |
| 2 | 189 |
| 3 | 199 |
| 4 | 3771 |
| 5 | 3970 |
| 6 | 75231 |
| 7 | 79201 |
| 8 | 1500849 |
| 9 | 1580050 |
| 10 | 29941749 |
| 11 | 31521799 |
| 12 | 597334131 |
| 13 | 628855930 |
| 14 | 11916740871 |
| 15 | 12545596801 |
| 16 | 237737483289 |
| 17 | 250283080090 |
| 18 | 4742832924909 |
| 19 | 4993116004999 |
| 20 | 94618921014891 |
| 21 | 99612037019890 |
| 22 | 1887635587372911 |
| 23 | 1987247624392801 |