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 | 3 |
| 3 | 26 |
| 4 | 471 |
| 5 | 13953 |
| 6 | 627421 |
| 7 | 39873948 |
| 8 | 3406344237 |
| 9 | 376591685322 |
| 10 | 52319828460127 |
| 11 | 8922977163384085 |
| 12 | 1832831375530080986 |
| 13 | 446306812127457163805 |
| 14 | 127130280682997045232005 |
| 15 | 41881054710966221044222595 |
| 16 | 15800074329058136531647698779 |