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 | 3 |
| 2 | 5 |
| 3 | 11 |
| 4 | 31 |
| 5 | 131 |
| 6 | 733 |
| 7 | 362903 |
| 8 | 39916831 |
| 9 | 355687428096059 |
| 10 | 6402373705728061 |
| 11 | 15511210043330985984000097 |
| 12 | 8222838654177922817725562880000127 |
| 13 | 815915283247897734345611269596115894272000000173 |