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 | 19 |
| 4 | 67 |
| 5 | 127 |
| 6 | 6619 |
| 7 | 126127 |
| 8 | 345979 |
| 9 | 476407 |
| 10 | 1658119 |
| 11 | 15182459419 |
| 12 | 105169832587 |
| 13 | 287583971287 |