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 | 17 |
| 3 | 3 |
| 4 | 1481 |
| 5 | 5 |
| 6 | 149 |
| 7 | 569 |
| 8 | 2081 |
| 9 | 2339 |
| 10 | 5939831 |
| 11 | 11 |
| 12 | 33164857769 |
| 13 | 3217755097229 |
| 14 | 272259344081 |
| 15 | 17762917045631 |