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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 17 |
| 6 | 29 |
| 7 | 43 |
| 8 | 59 |
| 9 | 97 |
| 10 | 509 |
| 11 | 1559 |
| 12 | 12239 |
| 13 | 198719 |
| 14 | 379439 |
| 15 | 633599 |
| 16 | 1136678399 |
| 17 | 33739804799 |
| 18 | 99298742399 |
| 19 | 1990648483199 |
| 20 | 59126328543388935628799 |
| 21 | 3797826416991538753535999 |
| 22 | 2409161546475779555007420356689919999 |
| 23 | 9325555101161759039183007326207999999 |