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 | 1 |
| 2 | 5 |
| 3 | 41 |
| 4 | 545 |
| 5 | 11681 |
| 6 | 402305 |
| 7 | 22207361 |
| 8 | 1961396225 |
| 9 | 276825510401 |
| 10 | 62368881977345 |
| 11 | 22413909724518401 |
| 12 | 12840603873823473665 |
| 13 | 11720394922432296755201 |
| 14 | 17037597932370037286600705 |