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 | 4 |
| 2 | 5 |
| 3 | 10 |
| 4 | 29 |
| 5 | 173 |
| 6 | 249 |
| 7 | 19073 |
| 8 | 71489 |
| 9 | 1166789 |
| 10 | 3800333 |
| 11 | 7021253 |
| 12 | 15920129 |
| 13 | 84551600693 |
| 14 | 224223772673 |