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 | 64 |
| 3 | 368 |
| 4 | 2776 |
| 5 | 25880 |
| 6 | 251704 |
| 7 | 2629080 |
| 8 | 28964248 |
| 9 | 331032312 |
| 10 | 3907675376 |
| 11 | 47392320240 |
| 12 | 587548108400 |
| 13 | 7421689479608 |
| 14 | 95248568409312 |
| 15 | 1239031994818680 |
| 16 | 16306127772957216 |
| 17 | 216760982171930144 |
| 18 | 2906731043068293952 |
| 19 | 39278080769921432856 |
| 20 | 534346120254755625336 |