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 | 1 |
| 1 | 1 |
| 2 | 15 |
| 3 | 666 |
| 4 | 59230 |
| 5 | 8775075 |
| 6 | 1948891581 |
| 7 | 605698755508 |
| 8 | 250914820143996 |
| 9 | 133610836793706405 |
| 10 | 88919025666286620475 |
| 11 | 72317513878698256697166 |
| 12 | 70571883548815735717843290 |
| 13 | 81383769918571603591381635271 |