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 | 3 |
| 2 | 19 |
| 3 | 47 |
| 4 | 586 |
| 5 | 293 |
| 6 | 1709 |
| 7 | 55542 |
| 8 | 340271 |
| 9 | 1537323 |
| 10 | 1745224 |
| 11 | 39935112 |
| 12 | 19967556 |
| 13 | 9983778 |
| 14 | 2446398139 |
| 15 | 22585503757 |
| 16 | 57069119066 |
| 17 | 333710340783 |
| 18 | 2837143256329 |
| 19 | 14770012057852 |
| 20 | 7385006028926 |
| 21 | 289794797936338 |
| 22 | 621734557171294 |
| 23 | 2695053069601272 |
| 24 | 1347526534800636 |