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 | 1 |
| 2 | 5 |
| 3 | 15 |
| 4 | 73 |
| 5 | 75 |
| 6 | 100347 |
| 7 | 637329 |
| 8 | 27067271 |
| 9 | 179993015 |
| 10 | 1208198523 |
| 11 | 55762149023 |
| 12 | 55762149103 |
| 13 | 382465573515 |