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 | 11 |
| 3 | 13 |
| 4 | 5 |
| 5 | 19 |
| 6 | 173 |
| 7 | 3163 |
| 8 | 83 |
| 9 | 21013 |
| 10 | 878359 |
| 11 | 3676219 |
| 12 | 239 |
| 13 | 43 |
| 14 | 5201390418463 |
| 15 | 86927887467919 |