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) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 13 |
| 3 | 19 |
| 4 | 241 |
| 5 | 331 |
| 6 | 109 |
| 7 | 5419 |
| 8 | 673 |
| 9 | 87211 |
| 10 | 1321 |
| 11 | 20857 |
| 12 | 38737 |
| 13 | 22366891 |
| 14 | 14449 |
| 15 | 18837001 |
| 16 | 22253377 |
| 17 | 43691 |
| 18 | 279073 |
| 19 | 160465489 |
| 20 | 4562284561 |
| 21 | 77158673929 |
| 22 | 4327489 |
| 23 | 168749965921 |
| 24 | 487824887233 |
| 25 | 1133836730401 |
| 26 | 21841 |
| 27 | 272010961 |
| 28 | 88959882481 |
| 29 | 96076791871613611 |