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 | 8 |
| 2 | 68 |
| 3 | 672 |
| 4 | 7588 |
| 5 | 93856 |
| 6 | 1229200 |
| 7 | 16695424 |
| 8 | 232418596 |
| 9 | 3293578784 |
| 10 | 47309094672 |
| 11 | 686870685312 |
| 12 | 10059942413584 |
| 13 | 148412250014336 |
| 14 | 2202990595617344 |
| 15 | 32873407393419776 |
| 16 | 492791264816231204 |