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 | 19 |
| 6 | 31 |
| 7 | 61 |
| 8 | 79 |
| 9 | 12241 |
| 10 | 19801 |
| 11 | 29641 |
| 12 | 76561 |
| 13 | 379441 |
| 14 | 2016841 |
| 15 | 2756161 |
| 16 | 1838865601 |
| 17 | 4150656721 |
| 18 | 337767408001 |
| 19 | 956960801281 |
| 20 | 21617114112001 |
| 21 | 1534815101952001 |
| 22 | 9590944392057601 |
| 23 | 30891838760640001 |
| 24 | 119715577952256001 |
| 25 | 767275551364608001 |