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 | 63 |
| 2 | 4161 |
| 3 | 274559 |
| 4 | 18116737 |
| 5 | 1195430079 |
| 6 | 78880268481 |
| 7 | 5204902289663 |
| 8 | 343444670849281 |
| 9 | 22662143373762879 |
| 10 | 1495358017997500737 |
| 11 | 98670967044461285759 |
| 12 | 6510788466916447359361 |
| 13 | 429613367849441064432063 |
| 14 | 28347971489596193805156801 |