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 | 7 |
| 3 | 193 |
| 4 | 443 |
| 5 | 14557 |
| 6 | 14557 |
| 7 | 735443 |
| 8 | 3124999 |
| 9 | 7812499 |
| 10 | 78124999 |
| 11 | 292968749 |
| 12 | 853235443 |
| 13 | 2441406251 |
| 14 | 53834264557 |
| 15 | 122070312499 |
| 16 | 202513391693 |
| 17 | 1118040735443 |
| 18 | 3459595983307 |
| 19 | 3459595983307 |
| 20 | 270488404577057 |